1b4cff454SVipin Bhandari /* 2b4cff454SVipin Bhandari * davinci_mmc.c - TI DaVinci MMC/SD/SDIO driver 3b4cff454SVipin Bhandari * 4b4cff454SVipin Bhandari * Copyright (C) 2006 Texas Instruments. 5b4cff454SVipin Bhandari * Original author: Purushotam Kumar 6b4cff454SVipin Bhandari * Copyright (C) 2009 David Brownell 7b4cff454SVipin Bhandari * 8b4cff454SVipin Bhandari * This program is free software; you can redistribute it and/or modify 9b4cff454SVipin Bhandari * it under the terms of the GNU General Public License as published by 10b4cff454SVipin Bhandari * the Free Software Foundation; either version 2 of the License, or 11b4cff454SVipin Bhandari * (at your option) any later version. 12b4cff454SVipin Bhandari * 13b4cff454SVipin Bhandari * This program is distributed in the hope that it will be useful, 14b4cff454SVipin Bhandari * but WITHOUT ANY WARRANTY; without even the implied warranty of 15b4cff454SVipin Bhandari * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16b4cff454SVipin Bhandari * GNU General Public License for more details. 17b4cff454SVipin Bhandari * 18b4cff454SVipin Bhandari * You should have received a copy of the GNU General Public License 19b4cff454SVipin Bhandari * along with this program; if not, write to the Free Software 20b4cff454SVipin Bhandari * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21b4cff454SVipin Bhandari */ 22b4cff454SVipin Bhandari 23b4cff454SVipin Bhandari #include <linux/module.h> 24b4cff454SVipin Bhandari #include <linux/ioport.h> 25b4cff454SVipin Bhandari #include <linux/platform_device.h> 26b4cff454SVipin Bhandari #include <linux/clk.h> 27b4cff454SVipin Bhandari #include <linux/err.h> 287e30b8deSChaithrika U S #include <linux/cpufreq.h> 29b4cff454SVipin Bhandari #include <linux/mmc/host.h> 30b4cff454SVipin Bhandari #include <linux/io.h> 31b4cff454SVipin Bhandari #include <linux/irq.h> 32b4cff454SVipin Bhandari #include <linux/delay.h> 335413da81SMatt Porter #include <linux/dmaengine.h> 34b4cff454SVipin Bhandari #include <linux/dma-mapping.h> 35b4cff454SVipin Bhandari #include <linux/mmc/mmc.h> 367b43da4cSManjunathappa, Prakash #include <linux/of.h> 377b43da4cSManjunathappa, Prakash #include <linux/of_device.h> 38c8301e79Sahaslam@baylibre.com #include <linux/mmc/slot-gpio.h> 39b4cff454SVipin Bhandari 40ec2a0833SArnd Bergmann #include <linux/platform_data/mmc-davinci.h> 41b4cff454SVipin Bhandari 42b4cff454SVipin Bhandari /* 43b4cff454SVipin Bhandari * Register Definitions 44b4cff454SVipin Bhandari */ 45b4cff454SVipin Bhandari #define DAVINCI_MMCCTL 0x00 /* Control Register */ 46b4cff454SVipin Bhandari #define DAVINCI_MMCCLK 0x04 /* Memory Clock Control Register */ 47b4cff454SVipin Bhandari #define DAVINCI_MMCST0 0x08 /* Status Register 0 */ 48b4cff454SVipin Bhandari #define DAVINCI_MMCST1 0x0C /* Status Register 1 */ 49b4cff454SVipin Bhandari #define DAVINCI_MMCIM 0x10 /* Interrupt Mask Register */ 50b4cff454SVipin Bhandari #define DAVINCI_MMCTOR 0x14 /* Response Time-Out Register */ 51b4cff454SVipin Bhandari #define DAVINCI_MMCTOD 0x18 /* Data Read Time-Out Register */ 52b4cff454SVipin Bhandari #define DAVINCI_MMCBLEN 0x1C /* Block Length Register */ 53b4cff454SVipin Bhandari #define DAVINCI_MMCNBLK 0x20 /* Number of Blocks Register */ 54b4cff454SVipin Bhandari #define DAVINCI_MMCNBLC 0x24 /* Number of Blocks Counter Register */ 55b4cff454SVipin Bhandari #define DAVINCI_MMCDRR 0x28 /* Data Receive Register */ 56b4cff454SVipin Bhandari #define DAVINCI_MMCDXR 0x2C /* Data Transmit Register */ 57b4cff454SVipin Bhandari #define DAVINCI_MMCCMD 0x30 /* Command Register */ 58b4cff454SVipin Bhandari #define DAVINCI_MMCARGHL 0x34 /* Argument Register */ 59b4cff454SVipin Bhandari #define DAVINCI_MMCRSP01 0x38 /* Response Register 0 and 1 */ 60b4cff454SVipin Bhandari #define DAVINCI_MMCRSP23 0x3C /* Response Register 0 and 1 */ 61b4cff454SVipin Bhandari #define DAVINCI_MMCRSP45 0x40 /* Response Register 0 and 1 */ 62b4cff454SVipin Bhandari #define DAVINCI_MMCRSP67 0x44 /* Response Register 0 and 1 */ 63b4cff454SVipin Bhandari #define DAVINCI_MMCDRSP 0x48 /* Data Response Register */ 64b4cff454SVipin Bhandari #define DAVINCI_MMCETOK 0x4C 65b4cff454SVipin Bhandari #define DAVINCI_MMCCIDX 0x50 /* Command Index Register */ 66b4cff454SVipin Bhandari #define DAVINCI_MMCCKC 0x54 67b4cff454SVipin Bhandari #define DAVINCI_MMCTORC 0x58 68b4cff454SVipin Bhandari #define DAVINCI_MMCTODC 0x5C 69b4cff454SVipin Bhandari #define DAVINCI_MMCBLNC 0x60 70b4cff454SVipin Bhandari #define DAVINCI_SDIOCTL 0x64 71b4cff454SVipin Bhandari #define DAVINCI_SDIOST0 0x68 72f9db92cbSAlagu Sankar #define DAVINCI_SDIOIEN 0x6C 73f9db92cbSAlagu Sankar #define DAVINCI_SDIOIST 0x70 74b4cff454SVipin Bhandari #define DAVINCI_MMCFIFOCTL 0x74 /* FIFO Control Register */ 75b4cff454SVipin Bhandari 76b4cff454SVipin Bhandari /* DAVINCI_MMCCTL definitions */ 77b4cff454SVipin Bhandari #define MMCCTL_DATRST (1 << 0) 78b4cff454SVipin Bhandari #define MMCCTL_CMDRST (1 << 1) 79132f1074SVipin Bhandari #define MMCCTL_WIDTH_8_BIT (1 << 8) 80b4cff454SVipin Bhandari #define MMCCTL_WIDTH_4_BIT (1 << 2) 81b4cff454SVipin Bhandari #define MMCCTL_DATEG_DISABLED (0 << 6) 82b4cff454SVipin Bhandari #define MMCCTL_DATEG_RISING (1 << 6) 83b4cff454SVipin Bhandari #define MMCCTL_DATEG_FALLING (2 << 6) 84b4cff454SVipin Bhandari #define MMCCTL_DATEG_BOTH (3 << 6) 85b4cff454SVipin Bhandari #define MMCCTL_PERMDR_LE (0 << 9) 86b4cff454SVipin Bhandari #define MMCCTL_PERMDR_BE (1 << 9) 87b4cff454SVipin Bhandari #define MMCCTL_PERMDX_LE (0 << 10) 88b4cff454SVipin Bhandari #define MMCCTL_PERMDX_BE (1 << 10) 89b4cff454SVipin Bhandari 90b4cff454SVipin Bhandari /* DAVINCI_MMCCLK definitions */ 91b4cff454SVipin Bhandari #define MMCCLK_CLKEN (1 << 8) 92b4cff454SVipin Bhandari #define MMCCLK_CLKRT_MASK (0xFF << 0) 93b4cff454SVipin Bhandari 94b4cff454SVipin Bhandari /* IRQ bit definitions, for DAVINCI_MMCST0 and DAVINCI_MMCIM */ 95b4cff454SVipin Bhandari #define MMCST0_DATDNE BIT(0) /* data done */ 96b4cff454SVipin Bhandari #define MMCST0_BSYDNE BIT(1) /* busy done */ 97b4cff454SVipin Bhandari #define MMCST0_RSPDNE BIT(2) /* command done */ 98b4cff454SVipin Bhandari #define MMCST0_TOUTRD BIT(3) /* data read timeout */ 99b4cff454SVipin Bhandari #define MMCST0_TOUTRS BIT(4) /* command response timeout */ 100b4cff454SVipin Bhandari #define MMCST0_CRCWR BIT(5) /* data write CRC error */ 101b4cff454SVipin Bhandari #define MMCST0_CRCRD BIT(6) /* data read CRC error */ 102b4cff454SVipin Bhandari #define MMCST0_CRCRS BIT(7) /* command response CRC error */ 103b4cff454SVipin Bhandari #define MMCST0_DXRDY BIT(9) /* data transmit ready (fifo empty) */ 104b4cff454SVipin Bhandari #define MMCST0_DRRDY BIT(10) /* data receive ready (data in fifo)*/ 105b4cff454SVipin Bhandari #define MMCST0_DATED BIT(11) /* DAT3 edge detect */ 106b4cff454SVipin Bhandari #define MMCST0_TRNDNE BIT(12) /* transfer done */ 107b4cff454SVipin Bhandari 108b4cff454SVipin Bhandari /* DAVINCI_MMCST1 definitions */ 109b4cff454SVipin Bhandari #define MMCST1_BUSY (1 << 0) 110b4cff454SVipin Bhandari 111b4cff454SVipin Bhandari /* DAVINCI_MMCCMD definitions */ 112b4cff454SVipin Bhandari #define MMCCMD_CMD_MASK (0x3F << 0) 113b4cff454SVipin Bhandari #define MMCCMD_PPLEN (1 << 7) 114b4cff454SVipin Bhandari #define MMCCMD_BSYEXP (1 << 8) 115b4cff454SVipin Bhandari #define MMCCMD_RSPFMT_MASK (3 << 9) 116b4cff454SVipin Bhandari #define MMCCMD_RSPFMT_NONE (0 << 9) 117b4cff454SVipin Bhandari #define MMCCMD_RSPFMT_R1456 (1 << 9) 118b4cff454SVipin Bhandari #define MMCCMD_RSPFMT_R2 (2 << 9) 119b4cff454SVipin Bhandari #define MMCCMD_RSPFMT_R3 (3 << 9) 120b4cff454SVipin Bhandari #define MMCCMD_DTRW (1 << 11) 121b4cff454SVipin Bhandari #define MMCCMD_STRMTP (1 << 12) 122b4cff454SVipin Bhandari #define MMCCMD_WDATX (1 << 13) 123b4cff454SVipin Bhandari #define MMCCMD_INITCK (1 << 14) 124b4cff454SVipin Bhandari #define MMCCMD_DCLR (1 << 15) 125b4cff454SVipin Bhandari #define MMCCMD_DMATRIG (1 << 16) 126b4cff454SVipin Bhandari 127b4cff454SVipin Bhandari /* DAVINCI_MMCFIFOCTL definitions */ 128b4cff454SVipin Bhandari #define MMCFIFOCTL_FIFORST (1 << 0) 129b4cff454SVipin Bhandari #define MMCFIFOCTL_FIFODIR_WR (1 << 1) 130b4cff454SVipin Bhandari #define MMCFIFOCTL_FIFODIR_RD (0 << 1) 131b4cff454SVipin Bhandari #define MMCFIFOCTL_FIFOLEV (1 << 2) /* 0 = 128 bits, 1 = 256 bits */ 132b4cff454SVipin Bhandari #define MMCFIFOCTL_ACCWD_4 (0 << 3) /* access width of 4 bytes */ 133b4cff454SVipin Bhandari #define MMCFIFOCTL_ACCWD_3 (1 << 3) /* access width of 3 bytes */ 134b4cff454SVipin Bhandari #define MMCFIFOCTL_ACCWD_2 (2 << 3) /* access width of 2 bytes */ 135b4cff454SVipin Bhandari #define MMCFIFOCTL_ACCWD_1 (3 << 3) /* access width of 1 byte */ 136b4cff454SVipin Bhandari 137f9db92cbSAlagu Sankar /* DAVINCI_SDIOST0 definitions */ 138f9db92cbSAlagu Sankar #define SDIOST0_DAT1_HI BIT(0) 139f9db92cbSAlagu Sankar 140f9db92cbSAlagu Sankar /* DAVINCI_SDIOIEN definitions */ 141f9db92cbSAlagu Sankar #define SDIOIEN_IOINTEN BIT(0) 142f9db92cbSAlagu Sankar 143f9db92cbSAlagu Sankar /* DAVINCI_SDIOIST definitions */ 144f9db92cbSAlagu Sankar #define SDIOIST_IOINT BIT(0) 145b4cff454SVipin Bhandari 146b4cff454SVipin Bhandari /* MMCSD Init clock in Hz in opendrain mode */ 147b4cff454SVipin Bhandari #define MMCSD_INIT_CLOCK 200000 148b4cff454SVipin Bhandari 149b4cff454SVipin Bhandari /* 150b4cff454SVipin Bhandari * One scatterlist dma "segment" is at most MAX_CCNT rw_threshold units, 151ca2afb6dSSudhakar Rajashekhara * and we handle up to MAX_NR_SG segments. MMC_BLOCK_BOUNCE kicks in only 152a36274e0SMartin K. Petersen * for drivers with max_segs == 1, making the segments bigger (64KB) 153ca2afb6dSSudhakar Rajashekhara * than the page or two that's otherwise typical. nr_sg (passed from 154ca2afb6dSSudhakar Rajashekhara * platform data) == 16 gives at least the same throughput boost, using 155ca2afb6dSSudhakar Rajashekhara * EDMA transfer linkage instead of spending CPU time copying pages. 156b4cff454SVipin Bhandari */ 157b4cff454SVipin Bhandari #define MAX_CCNT ((1 << 16) - 1) 158b4cff454SVipin Bhandari 159ca2afb6dSSudhakar Rajashekhara #define MAX_NR_SG 16 160b4cff454SVipin Bhandari 161b4cff454SVipin Bhandari static unsigned rw_threshold = 32; 162b4cff454SVipin Bhandari module_param(rw_threshold, uint, S_IRUGO); 163b4cff454SVipin Bhandari MODULE_PARM_DESC(rw_threshold, 164b4cff454SVipin Bhandari "Read/Write threshold. Default = 32"); 165b4cff454SVipin Bhandari 166ee698f50SIdo Yariv static unsigned poll_threshold = 128; 167ee698f50SIdo Yariv module_param(poll_threshold, uint, S_IRUGO); 168ee698f50SIdo Yariv MODULE_PARM_DESC(poll_threshold, 169ee698f50SIdo Yariv "Polling transaction size threshold. Default = 128"); 170ee698f50SIdo Yariv 171ee698f50SIdo Yariv static unsigned poll_loopcount = 32; 172ee698f50SIdo Yariv module_param(poll_loopcount, uint, S_IRUGO); 173ee698f50SIdo Yariv MODULE_PARM_DESC(poll_loopcount, 174ee698f50SIdo Yariv "Maximum polling loop count. Default = 32"); 175ee698f50SIdo Yariv 176b4cff454SVipin Bhandari static unsigned __initdata use_dma = 1; 177b4cff454SVipin Bhandari module_param(use_dma, uint, 0); 178b4cff454SVipin Bhandari MODULE_PARM_DESC(use_dma, "Whether to use DMA or not. Default = 1"); 179b4cff454SVipin Bhandari 180b4cff454SVipin Bhandari struct mmc_davinci_host { 181b4cff454SVipin Bhandari struct mmc_command *cmd; 182b4cff454SVipin Bhandari struct mmc_data *data; 183b4cff454SVipin Bhandari struct mmc_host *mmc; 184b4cff454SVipin Bhandari struct clk *clk; 185b4cff454SVipin Bhandari unsigned int mmc_input_clk; 186b4cff454SVipin Bhandari void __iomem *base; 187b4cff454SVipin Bhandari struct resource *mem_res; 188f9db92cbSAlagu Sankar int mmc_irq, sdio_irq; 189b4cff454SVipin Bhandari unsigned char bus_mode; 190b4cff454SVipin Bhandari 191b4cff454SVipin Bhandari #define DAVINCI_MMC_DATADIR_NONE 0 192b4cff454SVipin Bhandari #define DAVINCI_MMC_DATADIR_READ 1 193b4cff454SVipin Bhandari #define DAVINCI_MMC_DATADIR_WRITE 2 194b4cff454SVipin Bhandari unsigned char data_dir; 195b4cff454SVipin Bhandari 196b4cff454SVipin Bhandari /* buffer is used during PIO of one scatterlist segment, and 197b4cff454SVipin Bhandari * is updated along with buffer_bytes_left. bytes_left applies 198b4cff454SVipin Bhandari * to all N blocks of the PIO transfer. 199b4cff454SVipin Bhandari */ 200b4cff454SVipin Bhandari u8 *buffer; 201b4cff454SVipin Bhandari u32 buffer_bytes_left; 202b4cff454SVipin Bhandari u32 bytes_left; 203b4cff454SVipin Bhandari 2045413da81SMatt Porter struct dma_chan *dma_tx; 2055413da81SMatt Porter struct dma_chan *dma_rx; 206b4cff454SVipin Bhandari bool use_dma; 207b4cff454SVipin Bhandari bool do_dma; 208f9db92cbSAlagu Sankar bool sdio_int; 209ee698f50SIdo Yariv bool active_request; 210b4cff454SVipin Bhandari 211b4cff454SVipin Bhandari /* For PIO we walk scatterlists one segment at a time. */ 212b4cff454SVipin Bhandari unsigned int sg_len; 213b4cff454SVipin Bhandari struct scatterlist *sg; 214b4cff454SVipin Bhandari 215b4cff454SVipin Bhandari /* Version of the MMC/SD controller */ 216b4cff454SVipin Bhandari u8 version; 217b4cff454SVipin Bhandari /* for ns in one cycle calculation */ 218b4cff454SVipin Bhandari unsigned ns_in_one_cycle; 219ca2afb6dSSudhakar Rajashekhara /* Number of sg segments */ 220ca2afb6dSSudhakar Rajashekhara u8 nr_sg; 2217e30b8deSChaithrika U S #ifdef CONFIG_CPU_FREQ 2227e30b8deSChaithrika U S struct notifier_block freq_transition; 2237e30b8deSChaithrika U S #endif 224b4cff454SVipin Bhandari }; 225b4cff454SVipin Bhandari 226ee698f50SIdo Yariv static irqreturn_t mmc_davinci_irq(int irq, void *dev_id); 227b4cff454SVipin Bhandari 228b4cff454SVipin Bhandari /* PIO only */ 229b4cff454SVipin Bhandari static void mmc_davinci_sg_to_buf(struct mmc_davinci_host *host) 230b4cff454SVipin Bhandari { 231b4cff454SVipin Bhandari host->buffer_bytes_left = sg_dma_len(host->sg); 232b4cff454SVipin Bhandari host->buffer = sg_virt(host->sg); 233b4cff454SVipin Bhandari if (host->buffer_bytes_left > host->bytes_left) 234b4cff454SVipin Bhandari host->buffer_bytes_left = host->bytes_left; 235b4cff454SVipin Bhandari } 236b4cff454SVipin Bhandari 237b4cff454SVipin Bhandari static void davinci_fifo_data_trans(struct mmc_davinci_host *host, 238b4cff454SVipin Bhandari unsigned int n) 239b4cff454SVipin Bhandari { 240b4cff454SVipin Bhandari u8 *p; 241b4cff454SVipin Bhandari unsigned int i; 242b4cff454SVipin Bhandari 243b4cff454SVipin Bhandari if (host->buffer_bytes_left == 0) { 244b4cff454SVipin Bhandari host->sg = sg_next(host->data->sg); 245b4cff454SVipin Bhandari mmc_davinci_sg_to_buf(host); 246b4cff454SVipin Bhandari } 247b4cff454SVipin Bhandari 248b4cff454SVipin Bhandari p = host->buffer; 249b4cff454SVipin Bhandari if (n > host->buffer_bytes_left) 250b4cff454SVipin Bhandari n = host->buffer_bytes_left; 251b4cff454SVipin Bhandari host->buffer_bytes_left -= n; 252b4cff454SVipin Bhandari host->bytes_left -= n; 253b4cff454SVipin Bhandari 254b4cff454SVipin Bhandari /* NOTE: we never transfer more than rw_threshold bytes 255b4cff454SVipin Bhandari * to/from the fifo here; there's no I/O overlap. 256b4cff454SVipin Bhandari * This also assumes that access width( i.e. ACCWD) is 4 bytes 257b4cff454SVipin Bhandari */ 258b4cff454SVipin Bhandari if (host->data_dir == DAVINCI_MMC_DATADIR_WRITE) { 259b4cff454SVipin Bhandari for (i = 0; i < (n >> 2); i++) { 260b4cff454SVipin Bhandari writel(*((u32 *)p), host->base + DAVINCI_MMCDXR); 261b4cff454SVipin Bhandari p = p + 4; 262b4cff454SVipin Bhandari } 263b4cff454SVipin Bhandari if (n & 3) { 264b4cff454SVipin Bhandari iowrite8_rep(host->base + DAVINCI_MMCDXR, p, (n & 3)); 265b4cff454SVipin Bhandari p = p + (n & 3); 266b4cff454SVipin Bhandari } 267b4cff454SVipin Bhandari } else { 268b4cff454SVipin Bhandari for (i = 0; i < (n >> 2); i++) { 269b4cff454SVipin Bhandari *((u32 *)p) = readl(host->base + DAVINCI_MMCDRR); 270b4cff454SVipin Bhandari p = p + 4; 271b4cff454SVipin Bhandari } 272b4cff454SVipin Bhandari if (n & 3) { 273b4cff454SVipin Bhandari ioread8_rep(host->base + DAVINCI_MMCDRR, p, (n & 3)); 274b4cff454SVipin Bhandari p = p + (n & 3); 275b4cff454SVipin Bhandari } 276b4cff454SVipin Bhandari } 277b4cff454SVipin Bhandari host->buffer = p; 278b4cff454SVipin Bhandari } 279b4cff454SVipin Bhandari 280b4cff454SVipin Bhandari static void mmc_davinci_start_command(struct mmc_davinci_host *host, 281b4cff454SVipin Bhandari struct mmc_command *cmd) 282b4cff454SVipin Bhandari { 283b4cff454SVipin Bhandari u32 cmd_reg = 0; 284b4cff454SVipin Bhandari u32 im_val; 285b4cff454SVipin Bhandari 286b4cff454SVipin Bhandari dev_dbg(mmc_dev(host->mmc), "CMD%d, arg 0x%08x%s\n", 287b4cff454SVipin Bhandari cmd->opcode, cmd->arg, 288b4cff454SVipin Bhandari ({ char *s; 289b4cff454SVipin Bhandari switch (mmc_resp_type(cmd)) { 290b4cff454SVipin Bhandari case MMC_RSP_R1: 291b4cff454SVipin Bhandari s = ", R1/R5/R6/R7 response"; 292b4cff454SVipin Bhandari break; 293b4cff454SVipin Bhandari case MMC_RSP_R1B: 294b4cff454SVipin Bhandari s = ", R1b response"; 295b4cff454SVipin Bhandari break; 296b4cff454SVipin Bhandari case MMC_RSP_R2: 297b4cff454SVipin Bhandari s = ", R2 response"; 298b4cff454SVipin Bhandari break; 299b4cff454SVipin Bhandari case MMC_RSP_R3: 300b4cff454SVipin Bhandari s = ", R3/R4 response"; 301b4cff454SVipin Bhandari break; 302b4cff454SVipin Bhandari default: 303b4cff454SVipin Bhandari s = ", (R? response)"; 304b4cff454SVipin Bhandari break; 305b4cff454SVipin Bhandari }; s; })); 306b4cff454SVipin Bhandari host->cmd = cmd; 307b4cff454SVipin Bhandari 308b4cff454SVipin Bhandari switch (mmc_resp_type(cmd)) { 309b4cff454SVipin Bhandari case MMC_RSP_R1B: 310b4cff454SVipin Bhandari /* There's some spec confusion about when R1B is 311b4cff454SVipin Bhandari * allowed, but if the card doesn't issue a BUSY 312b4cff454SVipin Bhandari * then it's harmless for us to allow it. 313b4cff454SVipin Bhandari */ 314b4cff454SVipin Bhandari cmd_reg |= MMCCMD_BSYEXP; 315b4cff454SVipin Bhandari /* FALLTHROUGH */ 316b4cff454SVipin Bhandari case MMC_RSP_R1: /* 48 bits, CRC */ 317b4cff454SVipin Bhandari cmd_reg |= MMCCMD_RSPFMT_R1456; 318b4cff454SVipin Bhandari break; 319b4cff454SVipin Bhandari case MMC_RSP_R2: /* 136 bits, CRC */ 320b4cff454SVipin Bhandari cmd_reg |= MMCCMD_RSPFMT_R2; 321b4cff454SVipin Bhandari break; 322b4cff454SVipin Bhandari case MMC_RSP_R3: /* 48 bits, no CRC */ 323b4cff454SVipin Bhandari cmd_reg |= MMCCMD_RSPFMT_R3; 324b4cff454SVipin Bhandari break; 325b4cff454SVipin Bhandari default: 326b4cff454SVipin Bhandari cmd_reg |= MMCCMD_RSPFMT_NONE; 327b4cff454SVipin Bhandari dev_dbg(mmc_dev(host->mmc), "unknown resp_type %04x\n", 328b4cff454SVipin Bhandari mmc_resp_type(cmd)); 329b4cff454SVipin Bhandari break; 330b4cff454SVipin Bhandari } 331b4cff454SVipin Bhandari 332b4cff454SVipin Bhandari /* Set command index */ 333b4cff454SVipin Bhandari cmd_reg |= cmd->opcode; 334b4cff454SVipin Bhandari 335b4cff454SVipin Bhandari /* Enable EDMA transfer triggers */ 336b4cff454SVipin Bhandari if (host->do_dma) 337b4cff454SVipin Bhandari cmd_reg |= MMCCMD_DMATRIG; 338b4cff454SVipin Bhandari 339b4cff454SVipin Bhandari if (host->version == MMC_CTLR_VERSION_2 && host->data != NULL && 340b4cff454SVipin Bhandari host->data_dir == DAVINCI_MMC_DATADIR_READ) 341b4cff454SVipin Bhandari cmd_reg |= MMCCMD_DMATRIG; 342b4cff454SVipin Bhandari 343b4cff454SVipin Bhandari /* Setting whether command involves data transfer or not */ 344b4cff454SVipin Bhandari if (cmd->data) 345b4cff454SVipin Bhandari cmd_reg |= MMCCMD_WDATX; 346b4cff454SVipin Bhandari 347b4cff454SVipin Bhandari /* Setting whether data read or write */ 348b4cff454SVipin Bhandari if (host->data_dir == DAVINCI_MMC_DATADIR_WRITE) 349b4cff454SVipin Bhandari cmd_reg |= MMCCMD_DTRW; 350b4cff454SVipin Bhandari 351b4cff454SVipin Bhandari if (host->bus_mode == MMC_BUSMODE_PUSHPULL) 352b4cff454SVipin Bhandari cmd_reg |= MMCCMD_PPLEN; 353b4cff454SVipin Bhandari 354b4cff454SVipin Bhandari /* set Command timeout */ 355b4cff454SVipin Bhandari writel(0x1FFF, host->base + DAVINCI_MMCTOR); 356b4cff454SVipin Bhandari 357b4cff454SVipin Bhandari /* Enable interrupt (calculate here, defer until FIFO is stuffed). */ 358b4cff454SVipin Bhandari im_val = MMCST0_RSPDNE | MMCST0_CRCRS | MMCST0_TOUTRS; 359b4cff454SVipin Bhandari if (host->data_dir == DAVINCI_MMC_DATADIR_WRITE) { 360b4cff454SVipin Bhandari im_val |= MMCST0_DATDNE | MMCST0_CRCWR; 361b4cff454SVipin Bhandari 362b4cff454SVipin Bhandari if (!host->do_dma) 363b4cff454SVipin Bhandari im_val |= MMCST0_DXRDY; 364b4cff454SVipin Bhandari } else if (host->data_dir == DAVINCI_MMC_DATADIR_READ) { 365b4cff454SVipin Bhandari im_val |= MMCST0_DATDNE | MMCST0_CRCRD | MMCST0_TOUTRD; 366b4cff454SVipin Bhandari 367b4cff454SVipin Bhandari if (!host->do_dma) 368b4cff454SVipin Bhandari im_val |= MMCST0_DRRDY; 369b4cff454SVipin Bhandari } 370b4cff454SVipin Bhandari 371b4cff454SVipin Bhandari /* 372b4cff454SVipin Bhandari * Before non-DMA WRITE commands the controller needs priming: 373b4cff454SVipin Bhandari * FIFO should be populated with 32 bytes i.e. whatever is the FIFO size 374b4cff454SVipin Bhandari */ 375b4cff454SVipin Bhandari if (!host->do_dma && (host->data_dir == DAVINCI_MMC_DATADIR_WRITE)) 376b4cff454SVipin Bhandari davinci_fifo_data_trans(host, rw_threshold); 377b4cff454SVipin Bhandari 378b4cff454SVipin Bhandari writel(cmd->arg, host->base + DAVINCI_MMCARGHL); 379b4cff454SVipin Bhandari writel(cmd_reg, host->base + DAVINCI_MMCCMD); 380ee698f50SIdo Yariv 381ee698f50SIdo Yariv host->active_request = true; 382ee698f50SIdo Yariv 383ee698f50SIdo Yariv if (!host->do_dma && host->bytes_left <= poll_threshold) { 384ee698f50SIdo Yariv u32 count = poll_loopcount; 385ee698f50SIdo Yariv 386ee698f50SIdo Yariv while (host->active_request && count--) { 387ee698f50SIdo Yariv mmc_davinci_irq(0, host); 388ee698f50SIdo Yariv cpu_relax(); 389ee698f50SIdo Yariv } 390ee698f50SIdo Yariv } 391ee698f50SIdo Yariv 392ee698f50SIdo Yariv if (host->active_request) 393b4cff454SVipin Bhandari writel(im_val, host->base + DAVINCI_MMCIM); 394b4cff454SVipin Bhandari } 395b4cff454SVipin Bhandari 396b4cff454SVipin Bhandari /*----------------------------------------------------------------------*/ 397b4cff454SVipin Bhandari 398b4cff454SVipin Bhandari /* DMA infrastructure */ 399b4cff454SVipin Bhandari 400b4cff454SVipin Bhandari static void davinci_abort_dma(struct mmc_davinci_host *host) 401b4cff454SVipin Bhandari { 4025413da81SMatt Porter struct dma_chan *sync_dev; 403b4cff454SVipin Bhandari 404b4cff454SVipin Bhandari if (host->data_dir == DAVINCI_MMC_DATADIR_READ) 4055413da81SMatt Porter sync_dev = host->dma_rx; 406b4cff454SVipin Bhandari else 4075413da81SMatt Porter sync_dev = host->dma_tx; 408b4cff454SVipin Bhandari 4095413da81SMatt Porter dmaengine_terminate_all(sync_dev); 410b4cff454SVipin Bhandari } 411b4cff454SVipin Bhandari 4125413da81SMatt Porter static int mmc_davinci_send_dma_request(struct mmc_davinci_host *host, 413b4cff454SVipin Bhandari struct mmc_data *data) 414b4cff454SVipin Bhandari { 4155413da81SMatt Porter struct dma_chan *chan; 4165413da81SMatt Porter struct dma_async_tx_descriptor *desc; 4175413da81SMatt Porter int ret = 0; 418b4cff454SVipin Bhandari 419b4cff454SVipin Bhandari if (host->data_dir == DAVINCI_MMC_DATADIR_WRITE) { 4205413da81SMatt Porter struct dma_slave_config dma_tx_conf = { 4215413da81SMatt Porter .direction = DMA_MEM_TO_DEV, 4225413da81SMatt Porter .dst_addr = host->mem_res->start + DAVINCI_MMCDXR, 4235413da81SMatt Porter .dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES, 4245413da81SMatt Porter .dst_maxburst = 4255413da81SMatt Porter rw_threshold / DMA_SLAVE_BUSWIDTH_4_BYTES, 4265413da81SMatt Porter }; 4275413da81SMatt Porter chan = host->dma_tx; 4285413da81SMatt Porter dmaengine_slave_config(host->dma_tx, &dma_tx_conf); 4295413da81SMatt Porter 4305413da81SMatt Porter desc = dmaengine_prep_slave_sg(host->dma_tx, 4315413da81SMatt Porter data->sg, 4325413da81SMatt Porter host->sg_len, 4335413da81SMatt Porter DMA_MEM_TO_DEV, 4345413da81SMatt Porter DMA_PREP_INTERRUPT | DMA_CTRL_ACK); 4355413da81SMatt Porter if (!desc) { 4365413da81SMatt Porter dev_dbg(mmc_dev(host->mmc), 4375413da81SMatt Porter "failed to allocate DMA TX descriptor"); 4385413da81SMatt Porter ret = -1; 4395413da81SMatt Porter goto out; 4405413da81SMatt Porter } 441b4cff454SVipin Bhandari } else { 4425413da81SMatt Porter struct dma_slave_config dma_rx_conf = { 4435413da81SMatt Porter .direction = DMA_DEV_TO_MEM, 4445413da81SMatt Porter .src_addr = host->mem_res->start + DAVINCI_MMCDRR, 4455413da81SMatt Porter .src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES, 4465413da81SMatt Porter .src_maxburst = 4475413da81SMatt Porter rw_threshold / DMA_SLAVE_BUSWIDTH_4_BYTES, 4485413da81SMatt Porter }; 4495413da81SMatt Porter chan = host->dma_rx; 4505413da81SMatt Porter dmaengine_slave_config(host->dma_rx, &dma_rx_conf); 4515413da81SMatt Porter 4525413da81SMatt Porter desc = dmaengine_prep_slave_sg(host->dma_rx, 4535413da81SMatt Porter data->sg, 4545413da81SMatt Porter host->sg_len, 4555413da81SMatt Porter DMA_DEV_TO_MEM, 4565413da81SMatt Porter DMA_PREP_INTERRUPT | DMA_CTRL_ACK); 4575413da81SMatt Porter if (!desc) { 4585413da81SMatt Porter dev_dbg(mmc_dev(host->mmc), 4595413da81SMatt Porter "failed to allocate DMA RX descriptor"); 4605413da81SMatt Porter ret = -1; 4615413da81SMatt Porter goto out; 4625413da81SMatt Porter } 463b4cff454SVipin Bhandari } 464b4cff454SVipin Bhandari 4655413da81SMatt Porter dmaengine_submit(desc); 4665413da81SMatt Porter dma_async_issue_pending(chan); 467b4cff454SVipin Bhandari 4685413da81SMatt Porter out: 4695413da81SMatt Porter return ret; 470b4cff454SVipin Bhandari } 471b4cff454SVipin Bhandari 472b4cff454SVipin Bhandari static int mmc_davinci_start_dma_transfer(struct mmc_davinci_host *host, 473b4cff454SVipin Bhandari struct mmc_data *data) 474b4cff454SVipin Bhandari { 475b4cff454SVipin Bhandari int i; 476b4cff454SVipin Bhandari int mask = rw_threshold - 1; 4775413da81SMatt Porter int ret = 0; 478b4cff454SVipin Bhandari 479b4cff454SVipin Bhandari host->sg_len = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len, 480b4cff454SVipin Bhandari ((data->flags & MMC_DATA_WRITE) 481b4cff454SVipin Bhandari ? DMA_TO_DEVICE 482b4cff454SVipin Bhandari : DMA_FROM_DEVICE)); 483b4cff454SVipin Bhandari 484b4cff454SVipin Bhandari /* no individual DMA segment should need a partial FIFO */ 485b4cff454SVipin Bhandari for (i = 0; i < host->sg_len; i++) { 486b4cff454SVipin Bhandari if (sg_dma_len(data->sg + i) & mask) { 487b4cff454SVipin Bhandari dma_unmap_sg(mmc_dev(host->mmc), 488b4cff454SVipin Bhandari data->sg, data->sg_len, 489b4cff454SVipin Bhandari (data->flags & MMC_DATA_WRITE) 490b4cff454SVipin Bhandari ? DMA_TO_DEVICE 491b4cff454SVipin Bhandari : DMA_FROM_DEVICE); 492b4cff454SVipin Bhandari return -1; 493b4cff454SVipin Bhandari } 494b4cff454SVipin Bhandari } 495b4cff454SVipin Bhandari 496b4cff454SVipin Bhandari host->do_dma = 1; 4975413da81SMatt Porter ret = mmc_davinci_send_dma_request(host, data); 498b4cff454SVipin Bhandari 4995413da81SMatt Porter return ret; 500b4cff454SVipin Bhandari } 501b4cff454SVipin Bhandari 502b4cff454SVipin Bhandari static void __init_or_module 503b4cff454SVipin Bhandari davinci_release_dma_channels(struct mmc_davinci_host *host) 504b4cff454SVipin Bhandari { 505b4cff454SVipin Bhandari if (!host->use_dma) 506b4cff454SVipin Bhandari return; 507b4cff454SVipin Bhandari 5085413da81SMatt Porter dma_release_channel(host->dma_tx); 5095413da81SMatt Porter dma_release_channel(host->dma_rx); 510b4cff454SVipin Bhandari } 511b4cff454SVipin Bhandari 512b4cff454SVipin Bhandari static int __init davinci_acquire_dma_channels(struct mmc_davinci_host *host) 513b4cff454SVipin Bhandari { 5140a4d7236SPeter Ujfalusi host->dma_tx = dma_request_chan(mmc_dev(host->mmc), "tx"); 5150a4d7236SPeter Ujfalusi if (IS_ERR(host->dma_tx)) { 5165413da81SMatt Porter dev_err(mmc_dev(host->mmc), "Can't get dma_tx channel\n"); 5170a4d7236SPeter Ujfalusi return PTR_ERR(host->dma_tx); 518b4cff454SVipin Bhandari } 519b4cff454SVipin Bhandari 5200a4d7236SPeter Ujfalusi host->dma_rx = dma_request_chan(mmc_dev(host->mmc), "rx"); 5210a4d7236SPeter Ujfalusi if (IS_ERR(host->dma_rx)) { 5225413da81SMatt Porter dev_err(mmc_dev(host->mmc), "Can't get dma_rx channel\n"); 5230a4d7236SPeter Ujfalusi dma_release_channel(host->dma_tx); 5240a4d7236SPeter Ujfalusi return PTR_ERR(host->dma_rx); 525b4cff454SVipin Bhandari } 526b4cff454SVipin Bhandari 527b4cff454SVipin Bhandari return 0; 528b4cff454SVipin Bhandari } 529b4cff454SVipin Bhandari 530b4cff454SVipin Bhandari /*----------------------------------------------------------------------*/ 531b4cff454SVipin Bhandari 532b4cff454SVipin Bhandari static void 533b4cff454SVipin Bhandari mmc_davinci_prepare_data(struct mmc_davinci_host *host, struct mmc_request *req) 534b4cff454SVipin Bhandari { 535b4cff454SVipin Bhandari int fifo_lev = (rw_threshold == 32) ? MMCFIFOCTL_FIFOLEV : 0; 536b4cff454SVipin Bhandari int timeout; 537b4cff454SVipin Bhandari struct mmc_data *data = req->data; 538b4cff454SVipin Bhandari 539b4cff454SVipin Bhandari if (host->version == MMC_CTLR_VERSION_2) 540b4cff454SVipin Bhandari fifo_lev = (rw_threshold == 64) ? MMCFIFOCTL_FIFOLEV : 0; 541b4cff454SVipin Bhandari 542b4cff454SVipin Bhandari host->data = data; 543b4cff454SVipin Bhandari if (data == NULL) { 544b4cff454SVipin Bhandari host->data_dir = DAVINCI_MMC_DATADIR_NONE; 545b4cff454SVipin Bhandari writel(0, host->base + DAVINCI_MMCBLEN); 546b4cff454SVipin Bhandari writel(0, host->base + DAVINCI_MMCNBLK); 547b4cff454SVipin Bhandari return; 548b4cff454SVipin Bhandari } 549b4cff454SVipin Bhandari 550bbb66fcbSJaehoon Chung dev_dbg(mmc_dev(host->mmc), "%s, %d blocks of %d bytes\n", 551b4cff454SVipin Bhandari (data->flags & MMC_DATA_WRITE) ? "write" : "read", 552b4cff454SVipin Bhandari data->blocks, data->blksz); 553b4cff454SVipin Bhandari dev_dbg(mmc_dev(host->mmc), " DTO %d cycles + %d ns\n", 554b4cff454SVipin Bhandari data->timeout_clks, data->timeout_ns); 555b4cff454SVipin Bhandari timeout = data->timeout_clks + 556b4cff454SVipin Bhandari (data->timeout_ns / host->ns_in_one_cycle); 557b4cff454SVipin Bhandari if (timeout > 0xffff) 558b4cff454SVipin Bhandari timeout = 0xffff; 559b4cff454SVipin Bhandari 560b4cff454SVipin Bhandari writel(timeout, host->base + DAVINCI_MMCTOD); 561b4cff454SVipin Bhandari writel(data->blocks, host->base + DAVINCI_MMCNBLK); 562b4cff454SVipin Bhandari writel(data->blksz, host->base + DAVINCI_MMCBLEN); 563b4cff454SVipin Bhandari 564b4cff454SVipin Bhandari /* Configure the FIFO */ 565bbb66fcbSJaehoon Chung if (data->flags & MMC_DATA_WRITE) { 566b4cff454SVipin Bhandari host->data_dir = DAVINCI_MMC_DATADIR_WRITE; 567b4cff454SVipin Bhandari writel(fifo_lev | MMCFIFOCTL_FIFODIR_WR | MMCFIFOCTL_FIFORST, 568b4cff454SVipin Bhandari host->base + DAVINCI_MMCFIFOCTL); 569b4cff454SVipin Bhandari writel(fifo_lev | MMCFIFOCTL_FIFODIR_WR, 570b4cff454SVipin Bhandari host->base + DAVINCI_MMCFIFOCTL); 571bbb66fcbSJaehoon Chung } else { 572b4cff454SVipin Bhandari host->data_dir = DAVINCI_MMC_DATADIR_READ; 573b4cff454SVipin Bhandari writel(fifo_lev | MMCFIFOCTL_FIFODIR_RD | MMCFIFOCTL_FIFORST, 574b4cff454SVipin Bhandari host->base + DAVINCI_MMCFIFOCTL); 575b4cff454SVipin Bhandari writel(fifo_lev | MMCFIFOCTL_FIFODIR_RD, 576b4cff454SVipin Bhandari host->base + DAVINCI_MMCFIFOCTL); 577b4cff454SVipin Bhandari } 578b4cff454SVipin Bhandari 579b4cff454SVipin Bhandari host->buffer = NULL; 580b4cff454SVipin Bhandari host->bytes_left = data->blocks * data->blksz; 581b4cff454SVipin Bhandari 582b4cff454SVipin Bhandari /* For now we try to use DMA whenever we won't need partial FIFO 583b4cff454SVipin Bhandari * reads or writes, either for the whole transfer (as tested here) 584b4cff454SVipin Bhandari * or for any individual scatterlist segment (tested when we call 585b4cff454SVipin Bhandari * start_dma_transfer). 586b4cff454SVipin Bhandari * 587b4cff454SVipin Bhandari * While we *could* change that, unusual block sizes are rarely 588b4cff454SVipin Bhandari * used. The occasional fallback to PIO should't hurt. 589b4cff454SVipin Bhandari */ 590b4cff454SVipin Bhandari if (host->use_dma && (host->bytes_left & (rw_threshold - 1)) == 0 591b4cff454SVipin Bhandari && mmc_davinci_start_dma_transfer(host, data) == 0) { 592b4cff454SVipin Bhandari /* zero this to ensure we take no PIO paths */ 593b4cff454SVipin Bhandari host->bytes_left = 0; 594b4cff454SVipin Bhandari } else { 595b4cff454SVipin Bhandari /* Revert to CPU Copy */ 596b4cff454SVipin Bhandari host->sg_len = data->sg_len; 597b4cff454SVipin Bhandari host->sg = host->data->sg; 598b4cff454SVipin Bhandari mmc_davinci_sg_to_buf(host); 599b4cff454SVipin Bhandari } 600b4cff454SVipin Bhandari } 601b4cff454SVipin Bhandari 602b4cff454SVipin Bhandari static void mmc_davinci_request(struct mmc_host *mmc, struct mmc_request *req) 603b4cff454SVipin Bhandari { 604b4cff454SVipin Bhandari struct mmc_davinci_host *host = mmc_priv(mmc); 605b4cff454SVipin Bhandari unsigned long timeout = jiffies + msecs_to_jiffies(900); 606b4cff454SVipin Bhandari u32 mmcst1 = 0; 607b4cff454SVipin Bhandari 608b4cff454SVipin Bhandari /* Card may still be sending BUSY after a previous operation, 609b4cff454SVipin Bhandari * typically some kind of write. If so, we can't proceed yet. 610b4cff454SVipin Bhandari */ 611b4cff454SVipin Bhandari while (time_before(jiffies, timeout)) { 612b4cff454SVipin Bhandari mmcst1 = readl(host->base + DAVINCI_MMCST1); 613b4cff454SVipin Bhandari if (!(mmcst1 & MMCST1_BUSY)) 614b4cff454SVipin Bhandari break; 615b4cff454SVipin Bhandari cpu_relax(); 616b4cff454SVipin Bhandari } 617b4cff454SVipin Bhandari if (mmcst1 & MMCST1_BUSY) { 618b4cff454SVipin Bhandari dev_err(mmc_dev(host->mmc), "still BUSY? bad ... \n"); 619b4cff454SVipin Bhandari req->cmd->error = -ETIMEDOUT; 620b4cff454SVipin Bhandari mmc_request_done(mmc, req); 621b4cff454SVipin Bhandari return; 622b4cff454SVipin Bhandari } 623b4cff454SVipin Bhandari 624b4cff454SVipin Bhandari host->do_dma = 0; 625b4cff454SVipin Bhandari mmc_davinci_prepare_data(host, req); 626b4cff454SVipin Bhandari mmc_davinci_start_command(host, req->cmd); 627b4cff454SVipin Bhandari } 628b4cff454SVipin Bhandari 629b4cff454SVipin Bhandari static unsigned int calculate_freq_for_card(struct mmc_davinci_host *host, 630b4cff454SVipin Bhandari unsigned int mmc_req_freq) 631b4cff454SVipin Bhandari { 632b4cff454SVipin Bhandari unsigned int mmc_freq = 0, mmc_pclk = 0, mmc_push_pull_divisor = 0; 633b4cff454SVipin Bhandari 634b4cff454SVipin Bhandari mmc_pclk = host->mmc_input_clk; 635b4cff454SVipin Bhandari if (mmc_req_freq && mmc_pclk > (2 * mmc_req_freq)) 636b4cff454SVipin Bhandari mmc_push_pull_divisor = ((unsigned int)mmc_pclk 637b4cff454SVipin Bhandari / (2 * mmc_req_freq)) - 1; 638b4cff454SVipin Bhandari else 639b4cff454SVipin Bhandari mmc_push_pull_divisor = 0; 640b4cff454SVipin Bhandari 641b4cff454SVipin Bhandari mmc_freq = (unsigned int)mmc_pclk 642b4cff454SVipin Bhandari / (2 * (mmc_push_pull_divisor + 1)); 643b4cff454SVipin Bhandari 644b4cff454SVipin Bhandari if (mmc_freq > mmc_req_freq) 645b4cff454SVipin Bhandari mmc_push_pull_divisor = mmc_push_pull_divisor + 1; 646b4cff454SVipin Bhandari /* Convert ns to clock cycles */ 647b4cff454SVipin Bhandari if (mmc_req_freq <= 400000) 648b4cff454SVipin Bhandari host->ns_in_one_cycle = (1000000) / (((mmc_pclk 649b4cff454SVipin Bhandari / (2 * (mmc_push_pull_divisor + 1)))/1000)); 650b4cff454SVipin Bhandari else 651b4cff454SVipin Bhandari host->ns_in_one_cycle = (1000000) / (((mmc_pclk 652b4cff454SVipin Bhandari / (2 * (mmc_push_pull_divisor + 1)))/1000000)); 653b4cff454SVipin Bhandari 654b4cff454SVipin Bhandari return mmc_push_pull_divisor; 655b4cff454SVipin Bhandari } 656b4cff454SVipin Bhandari 6577e30b8deSChaithrika U S static void calculate_clk_divider(struct mmc_host *mmc, struct mmc_ios *ios) 658b4cff454SVipin Bhandari { 659b4cff454SVipin Bhandari unsigned int open_drain_freq = 0, mmc_pclk = 0; 660b4cff454SVipin Bhandari unsigned int mmc_push_pull_freq = 0; 661b4cff454SVipin Bhandari struct mmc_davinci_host *host = mmc_priv(mmc); 662b4cff454SVipin Bhandari 663b4cff454SVipin Bhandari if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) { 664b4cff454SVipin Bhandari u32 temp; 665b4cff454SVipin Bhandari 666b4cff454SVipin Bhandari /* Ignoring the init clock value passed for fixing the inter 667b4cff454SVipin Bhandari * operability with different cards. 668b4cff454SVipin Bhandari */ 669b4cff454SVipin Bhandari open_drain_freq = ((unsigned int)mmc_pclk 670b4cff454SVipin Bhandari / (2 * MMCSD_INIT_CLOCK)) - 1; 671b4cff454SVipin Bhandari 672b4cff454SVipin Bhandari if (open_drain_freq > 0xFF) 673b4cff454SVipin Bhandari open_drain_freq = 0xFF; 674b4cff454SVipin Bhandari 675b4cff454SVipin Bhandari temp = readl(host->base + DAVINCI_MMCCLK) & ~MMCCLK_CLKRT_MASK; 676b4cff454SVipin Bhandari temp |= open_drain_freq; 677b4cff454SVipin Bhandari writel(temp, host->base + DAVINCI_MMCCLK); 678b4cff454SVipin Bhandari 679b4cff454SVipin Bhandari /* Convert ns to clock cycles */ 680b4cff454SVipin Bhandari host->ns_in_one_cycle = (1000000) / (MMCSD_INIT_CLOCK/1000); 681b4cff454SVipin Bhandari } else { 682b4cff454SVipin Bhandari u32 temp; 683b4cff454SVipin Bhandari mmc_push_pull_freq = calculate_freq_for_card(host, ios->clock); 684b4cff454SVipin Bhandari 685b4cff454SVipin Bhandari if (mmc_push_pull_freq > 0xFF) 686b4cff454SVipin Bhandari mmc_push_pull_freq = 0xFF; 687b4cff454SVipin Bhandari 688b4cff454SVipin Bhandari temp = readl(host->base + DAVINCI_MMCCLK) & ~MMCCLK_CLKEN; 689b4cff454SVipin Bhandari writel(temp, host->base + DAVINCI_MMCCLK); 690b4cff454SVipin Bhandari 691b4cff454SVipin Bhandari udelay(10); 692b4cff454SVipin Bhandari 693b4cff454SVipin Bhandari temp = readl(host->base + DAVINCI_MMCCLK) & ~MMCCLK_CLKRT_MASK; 694b4cff454SVipin Bhandari temp |= mmc_push_pull_freq; 695b4cff454SVipin Bhandari writel(temp, host->base + DAVINCI_MMCCLK); 696b4cff454SVipin Bhandari 697b4cff454SVipin Bhandari writel(temp | MMCCLK_CLKEN, host->base + DAVINCI_MMCCLK); 698b4cff454SVipin Bhandari 699b4cff454SVipin Bhandari udelay(10); 700b4cff454SVipin Bhandari } 7017e30b8deSChaithrika U S } 7027e30b8deSChaithrika U S 7037e30b8deSChaithrika U S static void mmc_davinci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 7047e30b8deSChaithrika U S { 7057e30b8deSChaithrika U S struct mmc_davinci_host *host = mmc_priv(mmc); 7064a9de8adSIdo Yariv struct platform_device *pdev = to_platform_device(mmc->parent); 7074a9de8adSIdo Yariv struct davinci_mmc_config *config = pdev->dev.platform_data; 7087e30b8deSChaithrika U S 7097e30b8deSChaithrika U S dev_dbg(mmc_dev(host->mmc), 7107e30b8deSChaithrika U S "clock %dHz busmode %d powermode %d Vdd %04x\n", 7117e30b8deSChaithrika U S ios->clock, ios->bus_mode, ios->power_mode, 7127e30b8deSChaithrika U S ios->vdd); 713132f1074SVipin Bhandari 7144a9de8adSIdo Yariv switch (ios->power_mode) { 7154a9de8adSIdo Yariv case MMC_POWER_OFF: 7164a9de8adSIdo Yariv if (config && config->set_power) 7174a9de8adSIdo Yariv config->set_power(pdev->id, false); 7184a9de8adSIdo Yariv break; 7194a9de8adSIdo Yariv case MMC_POWER_UP: 7204a9de8adSIdo Yariv if (config && config->set_power) 7214a9de8adSIdo Yariv config->set_power(pdev->id, true); 7224a9de8adSIdo Yariv break; 7234a9de8adSIdo Yariv } 7244a9de8adSIdo Yariv 725132f1074SVipin Bhandari switch (ios->bus_width) { 726132f1074SVipin Bhandari case MMC_BUS_WIDTH_8: 727132f1074SVipin Bhandari dev_dbg(mmc_dev(host->mmc), "Enabling 8 bit mode\n"); 728132f1074SVipin Bhandari writel((readl(host->base + DAVINCI_MMCCTL) & 729132f1074SVipin Bhandari ~MMCCTL_WIDTH_4_BIT) | MMCCTL_WIDTH_8_BIT, 730132f1074SVipin Bhandari host->base + DAVINCI_MMCCTL); 731132f1074SVipin Bhandari break; 732132f1074SVipin Bhandari case MMC_BUS_WIDTH_4: 7337e30b8deSChaithrika U S dev_dbg(mmc_dev(host->mmc), "Enabling 4 bit mode\n"); 734132f1074SVipin Bhandari if (host->version == MMC_CTLR_VERSION_2) 735132f1074SVipin Bhandari writel((readl(host->base + DAVINCI_MMCCTL) & 736132f1074SVipin Bhandari ~MMCCTL_WIDTH_8_BIT) | MMCCTL_WIDTH_4_BIT, 7377e30b8deSChaithrika U S host->base + DAVINCI_MMCCTL); 738132f1074SVipin Bhandari else 739132f1074SVipin Bhandari writel(readl(host->base + DAVINCI_MMCCTL) | 740132f1074SVipin Bhandari MMCCTL_WIDTH_4_BIT, 7417e30b8deSChaithrika U S host->base + DAVINCI_MMCCTL); 742132f1074SVipin Bhandari break; 743132f1074SVipin Bhandari case MMC_BUS_WIDTH_1: 744132f1074SVipin Bhandari dev_dbg(mmc_dev(host->mmc), "Enabling 1 bit mode\n"); 745132f1074SVipin Bhandari if (host->version == MMC_CTLR_VERSION_2) 746132f1074SVipin Bhandari writel(readl(host->base + DAVINCI_MMCCTL) & 747132f1074SVipin Bhandari ~(MMCCTL_WIDTH_8_BIT | MMCCTL_WIDTH_4_BIT), 748132f1074SVipin Bhandari host->base + DAVINCI_MMCCTL); 749132f1074SVipin Bhandari else 750132f1074SVipin Bhandari writel(readl(host->base + DAVINCI_MMCCTL) & 751132f1074SVipin Bhandari ~MMCCTL_WIDTH_4_BIT, 752132f1074SVipin Bhandari host->base + DAVINCI_MMCCTL); 753132f1074SVipin Bhandari break; 7547e30b8deSChaithrika U S } 7557e30b8deSChaithrika U S 7567e30b8deSChaithrika U S calculate_clk_divider(mmc, ios); 757b4cff454SVipin Bhandari 758b4cff454SVipin Bhandari host->bus_mode = ios->bus_mode; 759b4cff454SVipin Bhandari if (ios->power_mode == MMC_POWER_UP) { 760b4cff454SVipin Bhandari unsigned long timeout = jiffies + msecs_to_jiffies(50); 761b4cff454SVipin Bhandari bool lose = true; 762b4cff454SVipin Bhandari 763b4cff454SVipin Bhandari /* Send clock cycles, poll completion */ 764b4cff454SVipin Bhandari writel(0, host->base + DAVINCI_MMCARGHL); 765b4cff454SVipin Bhandari writel(MMCCMD_INITCK, host->base + DAVINCI_MMCCMD); 766b4cff454SVipin Bhandari while (time_before(jiffies, timeout)) { 767b4cff454SVipin Bhandari u32 tmp = readl(host->base + DAVINCI_MMCST0); 768b4cff454SVipin Bhandari 769b4cff454SVipin Bhandari if (tmp & MMCST0_RSPDNE) { 770b4cff454SVipin Bhandari lose = false; 771b4cff454SVipin Bhandari break; 772b4cff454SVipin Bhandari } 773b4cff454SVipin Bhandari cpu_relax(); 774b4cff454SVipin Bhandari } 775b4cff454SVipin Bhandari if (lose) 776b4cff454SVipin Bhandari dev_warn(mmc_dev(host->mmc), "powerup timeout\n"); 777b4cff454SVipin Bhandari } 778b4cff454SVipin Bhandari 779b4cff454SVipin Bhandari /* FIXME on power OFF, reset things ... */ 780b4cff454SVipin Bhandari } 781b4cff454SVipin Bhandari 782b4cff454SVipin Bhandari static void 783b4cff454SVipin Bhandari mmc_davinci_xfer_done(struct mmc_davinci_host *host, struct mmc_data *data) 784b4cff454SVipin Bhandari { 785b4cff454SVipin Bhandari host->data = NULL; 786b4cff454SVipin Bhandari 787f9db92cbSAlagu Sankar if (host->mmc->caps & MMC_CAP_SDIO_IRQ) { 788f9db92cbSAlagu Sankar /* 789f9db92cbSAlagu Sankar * SDIO Interrupt Detection work-around as suggested by 790f9db92cbSAlagu Sankar * Davinci Errata (TMS320DM355 Silicon Revision 1.1 Errata 791f9db92cbSAlagu Sankar * 2.1.6): Signal SDIO interrupt only if it is enabled by core 792f9db92cbSAlagu Sankar */ 793f9db92cbSAlagu Sankar if (host->sdio_int && !(readl(host->base + DAVINCI_SDIOST0) & 794f9db92cbSAlagu Sankar SDIOST0_DAT1_HI)) { 795f9db92cbSAlagu Sankar writel(SDIOIST_IOINT, host->base + DAVINCI_SDIOIST); 796f9db92cbSAlagu Sankar mmc_signal_sdio_irq(host->mmc); 797f9db92cbSAlagu Sankar } 798f9db92cbSAlagu Sankar } 799f9db92cbSAlagu Sankar 800b4cff454SVipin Bhandari if (host->do_dma) { 801b4cff454SVipin Bhandari davinci_abort_dma(host); 802b4cff454SVipin Bhandari 803b4cff454SVipin Bhandari dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len, 804b4cff454SVipin Bhandari (data->flags & MMC_DATA_WRITE) 805b4cff454SVipin Bhandari ? DMA_TO_DEVICE 806b4cff454SVipin Bhandari : DMA_FROM_DEVICE); 807b4cff454SVipin Bhandari host->do_dma = false; 808b4cff454SVipin Bhandari } 809b4cff454SVipin Bhandari host->data_dir = DAVINCI_MMC_DATADIR_NONE; 810b4cff454SVipin Bhandari 811b4cff454SVipin Bhandari if (!data->stop || (host->cmd && host->cmd->error)) { 812b4cff454SVipin Bhandari mmc_request_done(host->mmc, data->mrq); 813b4cff454SVipin Bhandari writel(0, host->base + DAVINCI_MMCIM); 814ee698f50SIdo Yariv host->active_request = false; 815b4cff454SVipin Bhandari } else 816b4cff454SVipin Bhandari mmc_davinci_start_command(host, data->stop); 817b4cff454SVipin Bhandari } 818b4cff454SVipin Bhandari 819b4cff454SVipin Bhandari static void mmc_davinci_cmd_done(struct mmc_davinci_host *host, 820b4cff454SVipin Bhandari struct mmc_command *cmd) 821b4cff454SVipin Bhandari { 822b4cff454SVipin Bhandari host->cmd = NULL; 823b4cff454SVipin Bhandari 824b4cff454SVipin Bhandari if (cmd->flags & MMC_RSP_PRESENT) { 825b4cff454SVipin Bhandari if (cmd->flags & MMC_RSP_136) { 826b4cff454SVipin Bhandari /* response type 2 */ 827b4cff454SVipin Bhandari cmd->resp[3] = readl(host->base + DAVINCI_MMCRSP01); 828b4cff454SVipin Bhandari cmd->resp[2] = readl(host->base + DAVINCI_MMCRSP23); 829b4cff454SVipin Bhandari cmd->resp[1] = readl(host->base + DAVINCI_MMCRSP45); 830b4cff454SVipin Bhandari cmd->resp[0] = readl(host->base + DAVINCI_MMCRSP67); 831b4cff454SVipin Bhandari } else { 832b4cff454SVipin Bhandari /* response types 1, 1b, 3, 4, 5, 6 */ 833b4cff454SVipin Bhandari cmd->resp[0] = readl(host->base + DAVINCI_MMCRSP67); 834b4cff454SVipin Bhandari } 835b4cff454SVipin Bhandari } 836b4cff454SVipin Bhandari 837b4cff454SVipin Bhandari if (host->data == NULL || cmd->error) { 838b4cff454SVipin Bhandari if (cmd->error == -ETIMEDOUT) 839b4cff454SVipin Bhandari cmd->mrq->cmd->retries = 0; 840b4cff454SVipin Bhandari mmc_request_done(host->mmc, cmd->mrq); 841b4cff454SVipin Bhandari writel(0, host->base + DAVINCI_MMCIM); 842ee698f50SIdo Yariv host->active_request = false; 843b4cff454SVipin Bhandari } 844b4cff454SVipin Bhandari } 845b4cff454SVipin Bhandari 84606de845fSChaithrika U S static inline void mmc_davinci_reset_ctrl(struct mmc_davinci_host *host, 84706de845fSChaithrika U S int val) 848b4cff454SVipin Bhandari { 849b4cff454SVipin Bhandari u32 temp; 850b4cff454SVipin Bhandari 851b4cff454SVipin Bhandari temp = readl(host->base + DAVINCI_MMCCTL); 85206de845fSChaithrika U S if (val) /* reset */ 85306de845fSChaithrika U S temp |= MMCCTL_CMDRST | MMCCTL_DATRST; 85406de845fSChaithrika U S else /* enable */ 855b4cff454SVipin Bhandari temp &= ~(MMCCTL_CMDRST | MMCCTL_DATRST); 85606de845fSChaithrika U S 857b4cff454SVipin Bhandari writel(temp, host->base + DAVINCI_MMCCTL); 85806de845fSChaithrika U S udelay(10); 85906de845fSChaithrika U S } 86006de845fSChaithrika U S 86106de845fSChaithrika U S static void 86206de845fSChaithrika U S davinci_abort_data(struct mmc_davinci_host *host, struct mmc_data *data) 86306de845fSChaithrika U S { 86406de845fSChaithrika U S mmc_davinci_reset_ctrl(host, 1); 86506de845fSChaithrika U S mmc_davinci_reset_ctrl(host, 0); 866b4cff454SVipin Bhandari } 867b4cff454SVipin Bhandari 868f9db92cbSAlagu Sankar static irqreturn_t mmc_davinci_sdio_irq(int irq, void *dev_id) 869f9db92cbSAlagu Sankar { 870f9db92cbSAlagu Sankar struct mmc_davinci_host *host = dev_id; 871f9db92cbSAlagu Sankar unsigned int status; 872f9db92cbSAlagu Sankar 873f9db92cbSAlagu Sankar status = readl(host->base + DAVINCI_SDIOIST); 874f9db92cbSAlagu Sankar if (status & SDIOIST_IOINT) { 875f9db92cbSAlagu Sankar dev_dbg(mmc_dev(host->mmc), 876f9db92cbSAlagu Sankar "SDIO interrupt status %x\n", status); 877f9db92cbSAlagu Sankar writel(status | SDIOIST_IOINT, host->base + DAVINCI_SDIOIST); 878f9db92cbSAlagu Sankar mmc_signal_sdio_irq(host->mmc); 879f9db92cbSAlagu Sankar } 880f9db92cbSAlagu Sankar return IRQ_HANDLED; 881f9db92cbSAlagu Sankar } 882f9db92cbSAlagu Sankar 883b4cff454SVipin Bhandari static irqreturn_t mmc_davinci_irq(int irq, void *dev_id) 884b4cff454SVipin Bhandari { 885b4cff454SVipin Bhandari struct mmc_davinci_host *host = (struct mmc_davinci_host *)dev_id; 886b4cff454SVipin Bhandari unsigned int status, qstatus; 887b4cff454SVipin Bhandari int end_command = 0; 888b4cff454SVipin Bhandari int end_transfer = 0; 889b4cff454SVipin Bhandari struct mmc_data *data = host->data; 890b4cff454SVipin Bhandari 891b4cff454SVipin Bhandari if (host->cmd == NULL && host->data == NULL) { 892b4cff454SVipin Bhandari status = readl(host->base + DAVINCI_MMCST0); 893b4cff454SVipin Bhandari dev_dbg(mmc_dev(host->mmc), 894b4cff454SVipin Bhandari "Spurious interrupt 0x%04x\n", status); 895b4cff454SVipin Bhandari /* Disable the interrupt from mmcsd */ 896b4cff454SVipin Bhandari writel(0, host->base + DAVINCI_MMCIM); 897b4cff454SVipin Bhandari return IRQ_NONE; 898b4cff454SVipin Bhandari } 899b4cff454SVipin Bhandari 900b4cff454SVipin Bhandari status = readl(host->base + DAVINCI_MMCST0); 901b4cff454SVipin Bhandari qstatus = status; 902b4cff454SVipin Bhandari 903b4cff454SVipin Bhandari /* handle FIFO first when using PIO for data. 904b4cff454SVipin Bhandari * bytes_left will decrease to zero as I/O progress and status will 905b4cff454SVipin Bhandari * read zero over iteration because this controller status 906b4cff454SVipin Bhandari * register(MMCST0) reports any status only once and it is cleared 907b4cff454SVipin Bhandari * by read. So, it is not unbouned loop even in the case of 908b4cff454SVipin Bhandari * non-dma. 909b4cff454SVipin Bhandari */ 910be7b5622SIdo Yariv if (host->bytes_left && (status & (MMCST0_DXRDY | MMCST0_DRRDY))) { 911be7b5622SIdo Yariv unsigned long im_val; 912be7b5622SIdo Yariv 913be7b5622SIdo Yariv /* 914be7b5622SIdo Yariv * If interrupts fire during the following loop, they will be 915be7b5622SIdo Yariv * handled by the handler, but the PIC will still buffer these. 916be7b5622SIdo Yariv * As a result, the handler will be called again to serve these 917be7b5622SIdo Yariv * needlessly. In order to avoid these spurious interrupts, 918be7b5622SIdo Yariv * keep interrupts masked during the loop. 919be7b5622SIdo Yariv */ 920be7b5622SIdo Yariv im_val = readl(host->base + DAVINCI_MMCIM); 921be7b5622SIdo Yariv writel(0, host->base + DAVINCI_MMCIM); 922be7b5622SIdo Yariv 923be7b5622SIdo Yariv do { 924b4cff454SVipin Bhandari davinci_fifo_data_trans(host, rw_threshold); 925b4cff454SVipin Bhandari status = readl(host->base + DAVINCI_MMCST0); 926b4cff454SVipin Bhandari qstatus |= status; 927be7b5622SIdo Yariv } while (host->bytes_left && 928be7b5622SIdo Yariv (status & (MMCST0_DXRDY | MMCST0_DRRDY))); 929be7b5622SIdo Yariv 930be7b5622SIdo Yariv /* 931be7b5622SIdo Yariv * If an interrupt is pending, it is assumed it will fire when 932be7b5622SIdo Yariv * it is unmasked. This assumption is also taken when the MMCIM 933be7b5622SIdo Yariv * is first set. Otherwise, writing to MMCIM after reading the 934be7b5622SIdo Yariv * status is race-prone. 935be7b5622SIdo Yariv */ 936be7b5622SIdo Yariv writel(im_val, host->base + DAVINCI_MMCIM); 937b4cff454SVipin Bhandari } 938b4cff454SVipin Bhandari 939b4cff454SVipin Bhandari if (qstatus & MMCST0_DATDNE) { 940b4cff454SVipin Bhandari /* All blocks sent/received, and CRC checks passed */ 941b4cff454SVipin Bhandari if (data != NULL) { 942b4cff454SVipin Bhandari if ((host->do_dma == 0) && (host->bytes_left > 0)) { 943b4cff454SVipin Bhandari /* if datasize < rw_threshold 944b4cff454SVipin Bhandari * no RX ints are generated 945b4cff454SVipin Bhandari */ 946b4cff454SVipin Bhandari davinci_fifo_data_trans(host, host->bytes_left); 947b4cff454SVipin Bhandari } 948b4cff454SVipin Bhandari end_transfer = 1; 949b4cff454SVipin Bhandari data->bytes_xfered = data->blocks * data->blksz; 950b4cff454SVipin Bhandari } else { 951b4cff454SVipin Bhandari dev_err(mmc_dev(host->mmc), 952b4cff454SVipin Bhandari "DATDNE with no host->data\n"); 953b4cff454SVipin Bhandari } 954b4cff454SVipin Bhandari } 955b4cff454SVipin Bhandari 956b4cff454SVipin Bhandari if (qstatus & MMCST0_TOUTRD) { 957b4cff454SVipin Bhandari /* Read data timeout */ 958b4cff454SVipin Bhandari data->error = -ETIMEDOUT; 959b4cff454SVipin Bhandari end_transfer = 1; 960b4cff454SVipin Bhandari 961b4cff454SVipin Bhandari dev_dbg(mmc_dev(host->mmc), 962b4cff454SVipin Bhandari "read data timeout, status %x\n", 963b4cff454SVipin Bhandari qstatus); 964b4cff454SVipin Bhandari 965b4cff454SVipin Bhandari davinci_abort_data(host, data); 966b4cff454SVipin Bhandari } 967b4cff454SVipin Bhandari 968b4cff454SVipin Bhandari if (qstatus & (MMCST0_CRCWR | MMCST0_CRCRD)) { 969b4cff454SVipin Bhandari /* Data CRC error */ 970b4cff454SVipin Bhandari data->error = -EILSEQ; 971b4cff454SVipin Bhandari end_transfer = 1; 972b4cff454SVipin Bhandari 973b4cff454SVipin Bhandari /* NOTE: this controller uses CRCWR to report both CRC 974b4cff454SVipin Bhandari * errors and timeouts (on writes). MMCDRSP values are 975b4cff454SVipin Bhandari * only weakly documented, but 0x9f was clearly a timeout 976b4cff454SVipin Bhandari * case and the two three-bit patterns in various SD specs 977b4cff454SVipin Bhandari * (101, 010) aren't part of it ... 978b4cff454SVipin Bhandari */ 979b4cff454SVipin Bhandari if (qstatus & MMCST0_CRCWR) { 980b4cff454SVipin Bhandari u32 temp = readb(host->base + DAVINCI_MMCDRSP); 981b4cff454SVipin Bhandari 982b4cff454SVipin Bhandari if (temp == 0x9f) 983b4cff454SVipin Bhandari data->error = -ETIMEDOUT; 984b4cff454SVipin Bhandari } 985b4cff454SVipin Bhandari dev_dbg(mmc_dev(host->mmc), "data %s %s error\n", 986b4cff454SVipin Bhandari (qstatus & MMCST0_CRCWR) ? "write" : "read", 987b4cff454SVipin Bhandari (data->error == -ETIMEDOUT) ? "timeout" : "CRC"); 988b4cff454SVipin Bhandari 989b4cff454SVipin Bhandari davinci_abort_data(host, data); 990b4cff454SVipin Bhandari } 991b4cff454SVipin Bhandari 992b4cff454SVipin Bhandari if (qstatus & MMCST0_TOUTRS) { 993b4cff454SVipin Bhandari /* Command timeout */ 994b4cff454SVipin Bhandari if (host->cmd) { 995b4cff454SVipin Bhandari dev_dbg(mmc_dev(host->mmc), 996b4cff454SVipin Bhandari "CMD%d timeout, status %x\n", 997b4cff454SVipin Bhandari host->cmd->opcode, qstatus); 998b4cff454SVipin Bhandari host->cmd->error = -ETIMEDOUT; 999b4cff454SVipin Bhandari if (data) { 1000b4cff454SVipin Bhandari end_transfer = 1; 1001b4cff454SVipin Bhandari davinci_abort_data(host, data); 1002b4cff454SVipin Bhandari } else 1003b4cff454SVipin Bhandari end_command = 1; 1004b4cff454SVipin Bhandari } 1005b4cff454SVipin Bhandari } 1006b4cff454SVipin Bhandari 1007b4cff454SVipin Bhandari if (qstatus & MMCST0_CRCRS) { 1008b4cff454SVipin Bhandari /* Command CRC error */ 1009b4cff454SVipin Bhandari dev_dbg(mmc_dev(host->mmc), "Command CRC error\n"); 1010b4cff454SVipin Bhandari if (host->cmd) { 1011b4cff454SVipin Bhandari host->cmd->error = -EILSEQ; 1012b4cff454SVipin Bhandari end_command = 1; 1013b4cff454SVipin Bhandari } 1014b4cff454SVipin Bhandari } 1015b4cff454SVipin Bhandari 1016b4cff454SVipin Bhandari if (qstatus & MMCST0_RSPDNE) { 1017b4cff454SVipin Bhandari /* End of command phase */ 1018b4cff454SVipin Bhandari end_command = (int) host->cmd; 1019b4cff454SVipin Bhandari } 1020b4cff454SVipin Bhandari 1021b4cff454SVipin Bhandari if (end_command) 1022b4cff454SVipin Bhandari mmc_davinci_cmd_done(host, host->cmd); 1023b4cff454SVipin Bhandari if (end_transfer) 1024b4cff454SVipin Bhandari mmc_davinci_xfer_done(host, data); 1025b4cff454SVipin Bhandari return IRQ_HANDLED; 1026b4cff454SVipin Bhandari } 1027b4cff454SVipin Bhandari 1028b4cff454SVipin Bhandari static int mmc_davinci_get_cd(struct mmc_host *mmc) 1029b4cff454SVipin Bhandari { 1030b4cff454SVipin Bhandari struct platform_device *pdev = to_platform_device(mmc->parent); 1031b4cff454SVipin Bhandari struct davinci_mmc_config *config = pdev->dev.platform_data; 1032b4cff454SVipin Bhandari 1033c8301e79Sahaslam@baylibre.com if (config && config->get_cd) 1034b4cff454SVipin Bhandari return config->get_cd(pdev->id); 1035c8301e79Sahaslam@baylibre.com 1036c8301e79Sahaslam@baylibre.com return mmc_gpio_get_cd(mmc); 1037b4cff454SVipin Bhandari } 1038b4cff454SVipin Bhandari 1039b4cff454SVipin Bhandari static int mmc_davinci_get_ro(struct mmc_host *mmc) 1040b4cff454SVipin Bhandari { 1041b4cff454SVipin Bhandari struct platform_device *pdev = to_platform_device(mmc->parent); 1042b4cff454SVipin Bhandari struct davinci_mmc_config *config = pdev->dev.platform_data; 1043b4cff454SVipin Bhandari 1044c8301e79Sahaslam@baylibre.com if (config && config->get_ro) 1045b4cff454SVipin Bhandari return config->get_ro(pdev->id); 1046c8301e79Sahaslam@baylibre.com 1047c8301e79Sahaslam@baylibre.com return mmc_gpio_get_ro(mmc); 1048b4cff454SVipin Bhandari } 1049b4cff454SVipin Bhandari 1050f9db92cbSAlagu Sankar static void mmc_davinci_enable_sdio_irq(struct mmc_host *mmc, int enable) 1051f9db92cbSAlagu Sankar { 1052f9db92cbSAlagu Sankar struct mmc_davinci_host *host = mmc_priv(mmc); 1053f9db92cbSAlagu Sankar 1054f9db92cbSAlagu Sankar if (enable) { 1055f9db92cbSAlagu Sankar if (!(readl(host->base + DAVINCI_SDIOST0) & SDIOST0_DAT1_HI)) { 1056f9db92cbSAlagu Sankar writel(SDIOIST_IOINT, host->base + DAVINCI_SDIOIST); 1057f9db92cbSAlagu Sankar mmc_signal_sdio_irq(host->mmc); 1058f9db92cbSAlagu Sankar } else { 1059f9db92cbSAlagu Sankar host->sdio_int = true; 1060f9db92cbSAlagu Sankar writel(readl(host->base + DAVINCI_SDIOIEN) | 1061f9db92cbSAlagu Sankar SDIOIEN_IOINTEN, host->base + DAVINCI_SDIOIEN); 1062f9db92cbSAlagu Sankar } 1063f9db92cbSAlagu Sankar } else { 1064f9db92cbSAlagu Sankar host->sdio_int = false; 1065f9db92cbSAlagu Sankar writel(readl(host->base + DAVINCI_SDIOIEN) & ~SDIOIEN_IOINTEN, 1066f9db92cbSAlagu Sankar host->base + DAVINCI_SDIOIEN); 1067f9db92cbSAlagu Sankar } 1068f9db92cbSAlagu Sankar } 1069f9db92cbSAlagu Sankar 1070b4cff454SVipin Bhandari static struct mmc_host_ops mmc_davinci_ops = { 1071b4cff454SVipin Bhandari .request = mmc_davinci_request, 1072b4cff454SVipin Bhandari .set_ios = mmc_davinci_set_ios, 1073b4cff454SVipin Bhandari .get_cd = mmc_davinci_get_cd, 1074b4cff454SVipin Bhandari .get_ro = mmc_davinci_get_ro, 1075f9db92cbSAlagu Sankar .enable_sdio_irq = mmc_davinci_enable_sdio_irq, 1076b4cff454SVipin Bhandari }; 1077b4cff454SVipin Bhandari 1078b4cff454SVipin Bhandari /*----------------------------------------------------------------------*/ 1079b4cff454SVipin Bhandari 10807e30b8deSChaithrika U S #ifdef CONFIG_CPU_FREQ 10817e30b8deSChaithrika U S static int mmc_davinci_cpufreq_transition(struct notifier_block *nb, 10827e30b8deSChaithrika U S unsigned long val, void *data) 10837e30b8deSChaithrika U S { 10847e30b8deSChaithrika U S struct mmc_davinci_host *host; 10857e30b8deSChaithrika U S unsigned int mmc_pclk; 10867e30b8deSChaithrika U S struct mmc_host *mmc; 10877e30b8deSChaithrika U S unsigned long flags; 10887e30b8deSChaithrika U S 10897e30b8deSChaithrika U S host = container_of(nb, struct mmc_davinci_host, freq_transition); 10907e30b8deSChaithrika U S mmc = host->mmc; 10917e30b8deSChaithrika U S mmc_pclk = clk_get_rate(host->clk); 10927e30b8deSChaithrika U S 10937e30b8deSChaithrika U S if (val == CPUFREQ_POSTCHANGE) { 10947e30b8deSChaithrika U S spin_lock_irqsave(&mmc->lock, flags); 10957e30b8deSChaithrika U S host->mmc_input_clk = mmc_pclk; 10967e30b8deSChaithrika U S calculate_clk_divider(mmc, &mmc->ios); 10977e30b8deSChaithrika U S spin_unlock_irqrestore(&mmc->lock, flags); 10987e30b8deSChaithrika U S } 10997e30b8deSChaithrika U S 11007e30b8deSChaithrika U S return 0; 11017e30b8deSChaithrika U S } 11027e30b8deSChaithrika U S 11037e30b8deSChaithrika U S static inline int mmc_davinci_cpufreq_register(struct mmc_davinci_host *host) 11047e30b8deSChaithrika U S { 11057e30b8deSChaithrika U S host->freq_transition.notifier_call = mmc_davinci_cpufreq_transition; 11067e30b8deSChaithrika U S 11077e30b8deSChaithrika U S return cpufreq_register_notifier(&host->freq_transition, 11087e30b8deSChaithrika U S CPUFREQ_TRANSITION_NOTIFIER); 11097e30b8deSChaithrika U S } 11107e30b8deSChaithrika U S 11117e30b8deSChaithrika U S static inline void mmc_davinci_cpufreq_deregister(struct mmc_davinci_host *host) 11127e30b8deSChaithrika U S { 11137e30b8deSChaithrika U S cpufreq_unregister_notifier(&host->freq_transition, 11147e30b8deSChaithrika U S CPUFREQ_TRANSITION_NOTIFIER); 11157e30b8deSChaithrika U S } 11167e30b8deSChaithrika U S #else 11177e30b8deSChaithrika U S static inline int mmc_davinci_cpufreq_register(struct mmc_davinci_host *host) 11187e30b8deSChaithrika U S { 11197e30b8deSChaithrika U S return 0; 11207e30b8deSChaithrika U S } 11217e30b8deSChaithrika U S 11227e30b8deSChaithrika U S static inline void mmc_davinci_cpufreq_deregister(struct mmc_davinci_host *host) 11237e30b8deSChaithrika U S { 11247e30b8deSChaithrika U S } 11257e30b8deSChaithrika U S #endif 1126b4cff454SVipin Bhandari static void __init init_mmcsd_host(struct mmc_davinci_host *host) 1127b4cff454SVipin Bhandari { 1128b4cff454SVipin Bhandari 112906de845fSChaithrika U S mmc_davinci_reset_ctrl(host, 1); 1130b4cff454SVipin Bhandari 1131b4cff454SVipin Bhandari writel(0, host->base + DAVINCI_MMCCLK); 1132b4cff454SVipin Bhandari writel(MMCCLK_CLKEN, host->base + DAVINCI_MMCCLK); 1133b4cff454SVipin Bhandari 1134b4cff454SVipin Bhandari writel(0x1FFF, host->base + DAVINCI_MMCTOR); 1135b4cff454SVipin Bhandari writel(0xFFFF, host->base + DAVINCI_MMCTOD); 1136b4cff454SVipin Bhandari 113706de845fSChaithrika U S mmc_davinci_reset_ctrl(host, 0); 1138b4cff454SVipin Bhandari } 1139b4cff454SVipin Bhandari 1140ed425fc4SKrzysztof Kozlowski static const struct platform_device_id davinci_mmc_devtype[] = { 1141d7ca4c75SManjunathappa, Prakash { 1142d7ca4c75SManjunathappa, Prakash .name = "dm6441-mmc", 1143d7ca4c75SManjunathappa, Prakash .driver_data = MMC_CTLR_VERSION_1, 1144d7ca4c75SManjunathappa, Prakash }, { 1145d7ca4c75SManjunathappa, Prakash .name = "da830-mmc", 1146d7ca4c75SManjunathappa, Prakash .driver_data = MMC_CTLR_VERSION_2, 1147d7ca4c75SManjunathappa, Prakash }, 1148d7ca4c75SManjunathappa, Prakash {}, 1149d7ca4c75SManjunathappa, Prakash }; 1150d7ca4c75SManjunathappa, Prakash MODULE_DEVICE_TABLE(platform, davinci_mmc_devtype); 1151d7ca4c75SManjunathappa, Prakash 11527b43da4cSManjunathappa, Prakash static const struct of_device_id davinci_mmc_dt_ids[] = { 11537b43da4cSManjunathappa, Prakash { 11547b43da4cSManjunathappa, Prakash .compatible = "ti,dm6441-mmc", 11557b43da4cSManjunathappa, Prakash .data = &davinci_mmc_devtype[MMC_CTLR_VERSION_1], 11567b43da4cSManjunathappa, Prakash }, 11577b43da4cSManjunathappa, Prakash { 11587b43da4cSManjunathappa, Prakash .compatible = "ti,da830-mmc", 11597b43da4cSManjunathappa, Prakash .data = &davinci_mmc_devtype[MMC_CTLR_VERSION_2], 11607b43da4cSManjunathappa, Prakash }, 11617b43da4cSManjunathappa, Prakash {}, 11627b43da4cSManjunathappa, Prakash }; 11637b43da4cSManjunathappa, Prakash MODULE_DEVICE_TABLE(of, davinci_mmc_dt_ids); 11647b43da4cSManjunathappa, Prakash 1165c8301e79Sahaslam@baylibre.com static int mmc_davinci_parse_pdata(struct mmc_host *mmc) 11667b43da4cSManjunathappa, Prakash { 1167c8301e79Sahaslam@baylibre.com struct platform_device *pdev = to_platform_device(mmc->parent); 11687b43da4cSManjunathappa, Prakash struct davinci_mmc_config *pdata = pdev->dev.platform_data; 1169c8301e79Sahaslam@baylibre.com struct mmc_davinci_host *host; 11706e628dadSahaslam@baylibre.com int ret; 11717b43da4cSManjunathappa, Prakash 1172c8301e79Sahaslam@baylibre.com if (!pdata) 1173c8301e79Sahaslam@baylibre.com return -EINVAL; 11747b43da4cSManjunathappa, Prakash 1175c8301e79Sahaslam@baylibre.com host = mmc_priv(mmc); 1176c8301e79Sahaslam@baylibre.com if (!host) 1177c8301e79Sahaslam@baylibre.com return -EINVAL; 11787b43da4cSManjunathappa, Prakash 1179c8301e79Sahaslam@baylibre.com if (pdata && pdata->nr_sg) 1180c8301e79Sahaslam@baylibre.com host->nr_sg = pdata->nr_sg - 1; 11817b43da4cSManjunathappa, Prakash 1182c8301e79Sahaslam@baylibre.com if (pdata && (pdata->wires == 4 || pdata->wires == 0)) 1183c8301e79Sahaslam@baylibre.com mmc->caps |= MMC_CAP_4_BIT_DATA; 11847b43da4cSManjunathappa, Prakash 1185c8301e79Sahaslam@baylibre.com if (pdata && (pdata->wires == 8)) 1186c8301e79Sahaslam@baylibre.com mmc->caps |= (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA); 1187c8301e79Sahaslam@baylibre.com 1188c8301e79Sahaslam@baylibre.com mmc->f_min = 312500; 1189c8301e79Sahaslam@baylibre.com mmc->f_max = 25000000; 1190c8301e79Sahaslam@baylibre.com if (pdata && pdata->max_freq) 1191c8301e79Sahaslam@baylibre.com mmc->f_max = pdata->max_freq; 1192c8301e79Sahaslam@baylibre.com if (pdata && pdata->caps) 1193c8301e79Sahaslam@baylibre.com mmc->caps |= pdata->caps; 1194c8301e79Sahaslam@baylibre.com 11956e628dadSahaslam@baylibre.com /* Register a cd gpio, if there is not one, enable polling */ 11966e628dadSahaslam@baylibre.com ret = mmc_gpiod_request_cd(mmc, "cd", 0, false, 0, NULL); 11976e628dadSahaslam@baylibre.com if (ret == -EPROBE_DEFER) 11986e628dadSahaslam@baylibre.com return ret; 11996e628dadSahaslam@baylibre.com else if (ret) 12006e628dadSahaslam@baylibre.com mmc->caps |= MMC_CAP_NEEDS_POLL; 12016e628dadSahaslam@baylibre.com 12026e628dadSahaslam@baylibre.com ret = mmc_gpiod_request_ro(mmc, "wp", 0, false, 0, NULL); 12036e628dadSahaslam@baylibre.com if (ret == -EPROBE_DEFER) 12046e628dadSahaslam@baylibre.com return ret; 12056e628dadSahaslam@baylibre.com 1206c8301e79Sahaslam@baylibre.com return 0; 12077b43da4cSManjunathappa, Prakash } 12087b43da4cSManjunathappa, Prakash 1209b4cff454SVipin Bhandari static int __init davinci_mmcsd_probe(struct platform_device *pdev) 1210b4cff454SVipin Bhandari { 1211c8301e79Sahaslam@baylibre.com const struct of_device_id *match; 1212b4cff454SVipin Bhandari struct mmc_davinci_host *host = NULL; 1213b4cff454SVipin Bhandari struct mmc_host *mmc = NULL; 1214b4cff454SVipin Bhandari struct resource *r, *mem = NULL; 121562ac52b2SDavid Lechner int ret, irq; 1216b4cff454SVipin Bhandari size_t mem_size; 1217d7ca4c75SManjunathappa, Prakash const struct platform_device_id *id_entry; 1218b4cff454SVipin Bhandari 1219b4cff454SVipin Bhandari r = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1220902a8a0bSArnd Bergmann if (!r) 122162ac52b2SDavid Lechner return -ENODEV; 1222902a8a0bSArnd Bergmann irq = platform_get_irq(pdev, 0); 1223902a8a0bSArnd Bergmann if (irq < 0) 1224902a8a0bSArnd Bergmann return irq; 1225b4cff454SVipin Bhandari 1226b4cff454SVipin Bhandari mem_size = resource_size(r); 122762ac52b2SDavid Lechner mem = devm_request_mem_region(&pdev->dev, r->start, mem_size, 122862ac52b2SDavid Lechner pdev->name); 1229b4cff454SVipin Bhandari if (!mem) 123062ac52b2SDavid Lechner return -EBUSY; 1231b4cff454SVipin Bhandari 1232b4cff454SVipin Bhandari mmc = mmc_alloc_host(sizeof(struct mmc_davinci_host), &pdev->dev); 1233b4cff454SVipin Bhandari if (!mmc) 123462ac52b2SDavid Lechner return -ENOMEM; 1235b4cff454SVipin Bhandari 1236b4cff454SVipin Bhandari host = mmc_priv(mmc); 1237b4cff454SVipin Bhandari host->mmc = mmc; /* Important */ 1238b4cff454SVipin Bhandari 1239b4cff454SVipin Bhandari host->mem_res = mem; 124062ac52b2SDavid Lechner host->base = devm_ioremap(&pdev->dev, mem->start, mem_size); 124162ac52b2SDavid Lechner if (!host->base) { 124262ac52b2SDavid Lechner ret = -ENOMEM; 124362ac52b2SDavid Lechner goto ioremap_fail; 124462ac52b2SDavid Lechner } 1245b4cff454SVipin Bhandari 124662ac52b2SDavid Lechner host->clk = devm_clk_get(&pdev->dev, NULL); 1247b4cff454SVipin Bhandari if (IS_ERR(host->clk)) { 1248b4cff454SVipin Bhandari ret = PTR_ERR(host->clk); 124962ac52b2SDavid Lechner goto clk_get_fail; 1250b4cff454SVipin Bhandari } 1251e2f3bfbdSDavid Lechner ret = clk_prepare_enable(host->clk); 125262ac52b2SDavid Lechner if (ret) 1253e2f3bfbdSDavid Lechner goto clk_prepare_enable_fail; 125462ac52b2SDavid Lechner 1255b4cff454SVipin Bhandari host->mmc_input_clk = clk_get_rate(host->clk); 1256b4cff454SVipin Bhandari 1257c8301e79Sahaslam@baylibre.com match = of_match_device(davinci_mmc_dt_ids, &pdev->dev); 1258c8301e79Sahaslam@baylibre.com if (match) { 1259c8301e79Sahaslam@baylibre.com pdev->id_entry = match->data; 1260c8301e79Sahaslam@baylibre.com ret = mmc_of_parse(mmc); 1261c8301e79Sahaslam@baylibre.com if (ret) { 1262c8301e79Sahaslam@baylibre.com dev_err(&pdev->dev, 1263c8301e79Sahaslam@baylibre.com "could not parse of data: %d\n", ret); 1264c8301e79Sahaslam@baylibre.com goto parse_fail; 1265c8301e79Sahaslam@baylibre.com } 1266c8301e79Sahaslam@baylibre.com } else { 1267c8301e79Sahaslam@baylibre.com ret = mmc_davinci_parse_pdata(mmc); 1268c8301e79Sahaslam@baylibre.com if (ret) { 1269c8301e79Sahaslam@baylibre.com dev_err(&pdev->dev, 1270c8301e79Sahaslam@baylibre.com "could not parse platform data: %d\n", ret); 1271c8301e79Sahaslam@baylibre.com goto parse_fail; 1272c8301e79Sahaslam@baylibre.com } } 1273ca2afb6dSSudhakar Rajashekhara 1274ca2afb6dSSudhakar Rajashekhara if (host->nr_sg > MAX_NR_SG || !host->nr_sg) 1275ca2afb6dSSudhakar Rajashekhara host->nr_sg = MAX_NR_SG; 1276ca2afb6dSSudhakar Rajashekhara 1277c8301e79Sahaslam@baylibre.com init_mmcsd_host(host); 1278c8301e79Sahaslam@baylibre.com 1279b4cff454SVipin Bhandari host->use_dma = use_dma; 1280f9db92cbSAlagu Sankar host->mmc_irq = irq; 1281f9db92cbSAlagu Sankar host->sdio_irq = platform_get_irq(pdev, 1); 1282b4cff454SVipin Bhandari 12830a4d7236SPeter Ujfalusi if (host->use_dma) { 12840a4d7236SPeter Ujfalusi ret = davinci_acquire_dma_channels(host); 12850a4d7236SPeter Ujfalusi if (ret == -EPROBE_DEFER) 128662ac52b2SDavid Lechner goto dma_probe_defer; 12870a4d7236SPeter Ujfalusi else if (ret) 1288b4cff454SVipin Bhandari host->use_dma = 0; 12890a4d7236SPeter Ujfalusi } 1290b4cff454SVipin Bhandari 1291132f1074SVipin Bhandari mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY; 1292b4cff454SVipin Bhandari 1293d7ca4c75SManjunathappa, Prakash id_entry = platform_get_device_id(pdev); 1294d7ca4c75SManjunathappa, Prakash if (id_entry) 1295d7ca4c75SManjunathappa, Prakash host->version = id_entry->driver_data; 1296b4cff454SVipin Bhandari 1297b4cff454SVipin Bhandari mmc->ops = &mmc_davinci_ops; 1298b4cff454SVipin Bhandari mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; 1299b4cff454SVipin Bhandari 1300b4cff454SVipin Bhandari /* With no iommu coalescing pages, each phys_seg is a hw_seg. 1301b4cff454SVipin Bhandari * Each hw_seg uses one EDMA parameter RAM slot, always one 1302b4cff454SVipin Bhandari * channel and then usually some linked slots. 1303b4cff454SVipin Bhandari */ 13045413da81SMatt Porter mmc->max_segs = MAX_NR_SG; 1305b4cff454SVipin Bhandari 1306b4cff454SVipin Bhandari /* EDMA limit per hw segment (one or two MBytes) */ 1307b4cff454SVipin Bhandari mmc->max_seg_size = MAX_CCNT * rw_threshold; 1308b4cff454SVipin Bhandari 1309b4cff454SVipin Bhandari /* MMC/SD controller limits for multiblock requests */ 1310b4cff454SVipin Bhandari mmc->max_blk_size = 4095; /* BLEN is 12 bits */ 1311b4cff454SVipin Bhandari mmc->max_blk_count = 65535; /* NBLK is 16 bits */ 1312b4cff454SVipin Bhandari mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; 1313b4cff454SVipin Bhandari 1314a36274e0SMartin K. Petersen dev_dbg(mmc_dev(host->mmc), "max_segs=%d\n", mmc->max_segs); 1315b4cff454SVipin Bhandari dev_dbg(mmc_dev(host->mmc), "max_blk_size=%d\n", mmc->max_blk_size); 1316b4cff454SVipin Bhandari dev_dbg(mmc_dev(host->mmc), "max_req_size=%d\n", mmc->max_req_size); 1317b4cff454SVipin Bhandari dev_dbg(mmc_dev(host->mmc), "max_seg_size=%d\n", mmc->max_seg_size); 1318b4cff454SVipin Bhandari 1319b4cff454SVipin Bhandari platform_set_drvdata(pdev, host); 1320b4cff454SVipin Bhandari 13217e30b8deSChaithrika U S ret = mmc_davinci_cpufreq_register(host); 13227e30b8deSChaithrika U S if (ret) { 13237e30b8deSChaithrika U S dev_err(&pdev->dev, "failed to register cpufreq\n"); 13247e30b8deSChaithrika U S goto cpu_freq_fail; 13257e30b8deSChaithrika U S } 13267e30b8deSChaithrika U S 1327b4cff454SVipin Bhandari ret = mmc_add_host(mmc); 1328b4cff454SVipin Bhandari if (ret < 0) 132962ac52b2SDavid Lechner goto mmc_add_host_fail; 1330b4cff454SVipin Bhandari 133162ac52b2SDavid Lechner ret = devm_request_irq(&pdev->dev, irq, mmc_davinci_irq, 0, 133262ac52b2SDavid Lechner mmc_hostname(mmc), host); 1333b4cff454SVipin Bhandari if (ret) 133462ac52b2SDavid Lechner goto request_irq_fail; 1335b4cff454SVipin Bhandari 1336f9db92cbSAlagu Sankar if (host->sdio_irq >= 0) { 133762ac52b2SDavid Lechner ret = devm_request_irq(&pdev->dev, host->sdio_irq, 133862ac52b2SDavid Lechner mmc_davinci_sdio_irq, 0, 1339f9db92cbSAlagu Sankar mmc_hostname(mmc), host); 1340f9db92cbSAlagu Sankar if (!ret) 1341f9db92cbSAlagu Sankar mmc->caps |= MMC_CAP_SDIO_IRQ; 1342f9db92cbSAlagu Sankar } 1343f9db92cbSAlagu Sankar 1344b4cff454SVipin Bhandari rename_region(mem, mmc_hostname(mmc)); 1345b4cff454SVipin Bhandari 1346b4cff454SVipin Bhandari dev_info(mmc_dev(host->mmc), "Using %s, %d-bit mode\n", 1347b4cff454SVipin Bhandari host->use_dma ? "DMA" : "PIO", 1348b4cff454SVipin Bhandari (mmc->caps & MMC_CAP_4_BIT_DATA) ? 4 : 1); 1349b4cff454SVipin Bhandari 1350b4cff454SVipin Bhandari return 0; 1351b4cff454SVipin Bhandari 135262ac52b2SDavid Lechner request_irq_fail: 135362ac52b2SDavid Lechner mmc_remove_host(mmc); 135462ac52b2SDavid Lechner mmc_add_host_fail: 13557e30b8deSChaithrika U S mmc_davinci_cpufreq_deregister(host); 13567e30b8deSChaithrika U S cpu_freq_fail: 1357b4cff454SVipin Bhandari davinci_release_dma_channels(host); 1358c8301e79Sahaslam@baylibre.com parse_fail: 135962ac52b2SDavid Lechner dma_probe_defer: 1360e2f3bfbdSDavid Lechner clk_disable_unprepare(host->clk); 1361e2f3bfbdSDavid Lechner clk_prepare_enable_fail: 136262ac52b2SDavid Lechner clk_get_fail: 136362ac52b2SDavid Lechner ioremap_fail: 1364b4cff454SVipin Bhandari mmc_free_host(mmc); 1365b4cff454SVipin Bhandari 1366b4cff454SVipin Bhandari return ret; 1367b4cff454SVipin Bhandari } 1368b4cff454SVipin Bhandari 1369b4cff454SVipin Bhandari static int __exit davinci_mmcsd_remove(struct platform_device *pdev) 1370b4cff454SVipin Bhandari { 1371b4cff454SVipin Bhandari struct mmc_davinci_host *host = platform_get_drvdata(pdev); 1372b4cff454SVipin Bhandari 1373b4cff454SVipin Bhandari mmc_remove_host(host->mmc); 137462ac52b2SDavid Lechner mmc_davinci_cpufreq_deregister(host); 1375b4cff454SVipin Bhandari davinci_release_dma_channels(host); 1376e2f3bfbdSDavid Lechner clk_disable_unprepare(host->clk); 1377b4cff454SVipin Bhandari mmc_free_host(host->mmc); 1378b4cff454SVipin Bhandari 1379b4cff454SVipin Bhandari return 0; 1380b4cff454SVipin Bhandari } 1381b4cff454SVipin Bhandari 1382b4cff454SVipin Bhandari #ifdef CONFIG_PM 1383bbce5802SChaithrika U S static int davinci_mmcsd_suspend(struct device *dev) 1384b4cff454SVipin Bhandari { 1385bbce5802SChaithrika U S struct platform_device *pdev = to_platform_device(dev); 1386b4cff454SVipin Bhandari struct mmc_davinci_host *host = platform_get_drvdata(pdev); 1387b4cff454SVipin Bhandari 1388bbce5802SChaithrika U S writel(0, host->base + DAVINCI_MMCIM); 1389bbce5802SChaithrika U S mmc_davinci_reset_ctrl(host, 1); 1390bbce5802SChaithrika U S clk_disable(host->clk); 1391b4cff454SVipin Bhandari 13925ffdeea5SUlf Hansson return 0; 1393b4cff454SVipin Bhandari } 1394bbce5802SChaithrika U S 1395bbce5802SChaithrika U S static int davinci_mmcsd_resume(struct device *dev) 1396bbce5802SChaithrika U S { 1397bbce5802SChaithrika U S struct platform_device *pdev = to_platform_device(dev); 1398bbce5802SChaithrika U S struct mmc_davinci_host *host = platform_get_drvdata(pdev); 1399bbce5802SChaithrika U S 1400bbce5802SChaithrika U S clk_enable(host->clk); 1401bbce5802SChaithrika U S mmc_davinci_reset_ctrl(host, 0); 1402bbce5802SChaithrika U S 14035ffdeea5SUlf Hansson return 0; 1404bbce5802SChaithrika U S } 1405bbce5802SChaithrika U S 1406bbce5802SChaithrika U S static const struct dev_pm_ops davinci_mmcsd_pm = { 1407bbce5802SChaithrika U S .suspend = davinci_mmcsd_suspend, 1408bbce5802SChaithrika U S .resume = davinci_mmcsd_resume, 1409bbce5802SChaithrika U S }; 1410bbce5802SChaithrika U S 1411bbce5802SChaithrika U S #define davinci_mmcsd_pm_ops (&davinci_mmcsd_pm) 1412b4cff454SVipin Bhandari #else 1413bbce5802SChaithrika U S #define davinci_mmcsd_pm_ops NULL 1414b4cff454SVipin Bhandari #endif 1415b4cff454SVipin Bhandari 1416b4cff454SVipin Bhandari static struct platform_driver davinci_mmcsd_driver = { 1417b4cff454SVipin Bhandari .driver = { 1418b4cff454SVipin Bhandari .name = "davinci_mmc", 1419bbce5802SChaithrika U S .pm = davinci_mmcsd_pm_ops, 14206fad5128SSachin Kamat .of_match_table = davinci_mmc_dt_ids, 1421b4cff454SVipin Bhandari }, 1422b4cff454SVipin Bhandari .remove = __exit_p(davinci_mmcsd_remove), 1423d7ca4c75SManjunathappa, Prakash .id_table = davinci_mmc_devtype, 1424b4cff454SVipin Bhandari }; 1425b4cff454SVipin Bhandari 1426d4bf6325SJingoo Han module_platform_driver_probe(davinci_mmcsd_driver, davinci_mmcsd_probe); 1427b4cff454SVipin Bhandari 1428b4cff454SVipin Bhandari MODULE_AUTHOR("Texas Instruments India"); 1429b4cff454SVipin Bhandari MODULE_LICENSE("GPL"); 1430b4cff454SVipin Bhandari MODULE_DESCRIPTION("MMC/SD driver for Davinci MMC controller"); 14317f8bea7fSJan Luebbe MODULE_ALIAS("platform:davinci_mmc"); 1432b4cff454SVipin Bhandari 1433