1236caa7cSMaen Suleiman /* 2236caa7cSMaen Suleiman * Marvell MMC/SD/SDIO driver 3236caa7cSMaen Suleiman * 4236caa7cSMaen Suleiman * Authors: Maen Suleiman, Nicolas Pitre 5236caa7cSMaen Suleiman * Copyright (C) 2008-2009 Marvell Ltd. 6236caa7cSMaen Suleiman * 7236caa7cSMaen Suleiman * This program is free software; you can redistribute it and/or modify 8236caa7cSMaen Suleiman * it under the terms of the GNU General Public License version 2 as 9236caa7cSMaen Suleiman * published by the Free Software Foundation. 10236caa7cSMaen Suleiman */ 11236caa7cSMaen Suleiman 12236caa7cSMaen Suleiman #include <linux/module.h> 13236caa7cSMaen Suleiman #include <linux/init.h> 14236caa7cSMaen Suleiman #include <linux/io.h> 15236caa7cSMaen Suleiman #include <linux/platform_device.h> 16236caa7cSMaen Suleiman #include <linux/mbus.h> 17236caa7cSMaen Suleiman #include <linux/delay.h> 18236caa7cSMaen Suleiman #include <linux/interrupt.h> 19236caa7cSMaen Suleiman #include <linux/dma-mapping.h> 20236caa7cSMaen Suleiman #include <linux/scatterlist.h> 21236caa7cSMaen Suleiman #include <linux/irq.h> 22236caa7cSMaen Suleiman #include <linux/gpio.h> 23236caa7cSMaen Suleiman #include <linux/mmc/host.h> 24236caa7cSMaen Suleiman 25236caa7cSMaen Suleiman #include <asm/sizes.h> 26236caa7cSMaen Suleiman #include <asm/unaligned.h> 27236caa7cSMaen Suleiman #include <plat/mvsdio.h> 28236caa7cSMaen Suleiman 29236caa7cSMaen Suleiman #include "mvsdio.h" 30236caa7cSMaen Suleiman 31236caa7cSMaen Suleiman #define DRIVER_NAME "mvsdio" 32236caa7cSMaen Suleiman 33236caa7cSMaen Suleiman static int maxfreq = MVSD_CLOCKRATE_MAX; 34236caa7cSMaen Suleiman static int nodma; 35236caa7cSMaen Suleiman 36236caa7cSMaen Suleiman struct mvsd_host { 37236caa7cSMaen Suleiman void __iomem *base; 38236caa7cSMaen Suleiman struct mmc_request *mrq; 39236caa7cSMaen Suleiman spinlock_t lock; 40236caa7cSMaen Suleiman unsigned int xfer_mode; 41236caa7cSMaen Suleiman unsigned int intr_en; 42236caa7cSMaen Suleiman unsigned int ctrl; 43236caa7cSMaen Suleiman unsigned int pio_size; 44236caa7cSMaen Suleiman void *pio_ptr; 45236caa7cSMaen Suleiman unsigned int sg_frags; 46236caa7cSMaen Suleiman unsigned int ns_per_clk; 47236caa7cSMaen Suleiman unsigned int clock; 48236caa7cSMaen Suleiman unsigned int base_clock; 49236caa7cSMaen Suleiman struct timer_list timer; 50236caa7cSMaen Suleiman struct mmc_host *mmc; 51236caa7cSMaen Suleiman struct device *dev; 52236caa7cSMaen Suleiman struct resource *res; 53236caa7cSMaen Suleiman int irq; 54236caa7cSMaen Suleiman int gpio_card_detect; 55236caa7cSMaen Suleiman int gpio_write_protect; 56236caa7cSMaen Suleiman }; 57236caa7cSMaen Suleiman 58236caa7cSMaen Suleiman #define mvsd_write(offs, val) writel(val, iobase + (offs)) 59236caa7cSMaen Suleiman #define mvsd_read(offs) readl(iobase + (offs)) 60236caa7cSMaen Suleiman 61236caa7cSMaen Suleiman static int mvsd_setup_data(struct mvsd_host *host, struct mmc_data *data) 62236caa7cSMaen Suleiman { 63236caa7cSMaen Suleiman void __iomem *iobase = host->base; 64236caa7cSMaen Suleiman unsigned int tmout; 65236caa7cSMaen Suleiman int tmout_index; 66236caa7cSMaen Suleiman 67236caa7cSMaen Suleiman /* If timeout=0 then maximum timeout index is used. */ 68236caa7cSMaen Suleiman tmout = DIV_ROUND_UP(data->timeout_ns, host->ns_per_clk); 69236caa7cSMaen Suleiman tmout += data->timeout_clks; 70236caa7cSMaen Suleiman tmout_index = fls(tmout - 1) - 12; 71236caa7cSMaen Suleiman if (tmout_index < 0) 72236caa7cSMaen Suleiman tmout_index = 0; 73236caa7cSMaen Suleiman if (tmout_index > MVSD_HOST_CTRL_TMOUT_MAX) 74236caa7cSMaen Suleiman tmout_index = MVSD_HOST_CTRL_TMOUT_MAX; 75236caa7cSMaen Suleiman 76236caa7cSMaen Suleiman dev_dbg(host->dev, "data %s at 0x%08x: blocks=%d blksz=%d tmout=%u (%d)\n", 77236caa7cSMaen Suleiman (data->flags & MMC_DATA_READ) ? "read" : "write", 78236caa7cSMaen Suleiman (u32)sg_virt(data->sg), data->blocks, data->blksz, 79236caa7cSMaen Suleiman tmout, tmout_index); 80236caa7cSMaen Suleiman 81236caa7cSMaen Suleiman host->ctrl &= ~MVSD_HOST_CTRL_TMOUT_MASK; 82236caa7cSMaen Suleiman host->ctrl |= MVSD_HOST_CTRL_TMOUT(tmout_index); 83236caa7cSMaen Suleiman mvsd_write(MVSD_HOST_CTRL, host->ctrl); 84236caa7cSMaen Suleiman mvsd_write(MVSD_BLK_COUNT, data->blocks); 85236caa7cSMaen Suleiman mvsd_write(MVSD_BLK_SIZE, data->blksz); 86236caa7cSMaen Suleiman 87236caa7cSMaen Suleiman if (nodma || (data->blksz | data->sg->offset) & 3) { 88236caa7cSMaen Suleiman /* 89236caa7cSMaen Suleiman * We cannot do DMA on a buffer which offset or size 90236caa7cSMaen Suleiman * is not aligned on a 4-byte boundary. 91236caa7cSMaen Suleiman */ 92236caa7cSMaen Suleiman host->pio_size = data->blocks * data->blksz; 93236caa7cSMaen Suleiman host->pio_ptr = sg_virt(data->sg); 94236caa7cSMaen Suleiman if (!nodma) 95236caa7cSMaen Suleiman printk(KERN_DEBUG "%s: fallback to PIO for data " 96236caa7cSMaen Suleiman "at 0x%p size %d\n", 97236caa7cSMaen Suleiman mmc_hostname(host->mmc), 98236caa7cSMaen Suleiman host->pio_ptr, host->pio_size); 99236caa7cSMaen Suleiman return 1; 100236caa7cSMaen Suleiman } else { 101236caa7cSMaen Suleiman dma_addr_t phys_addr; 102236caa7cSMaen Suleiman int dma_dir = (data->flags & MMC_DATA_READ) ? 103236caa7cSMaen Suleiman DMA_FROM_DEVICE : DMA_TO_DEVICE; 104236caa7cSMaen Suleiman host->sg_frags = dma_map_sg(mmc_dev(host->mmc), data->sg, 105236caa7cSMaen Suleiman data->sg_len, dma_dir); 106236caa7cSMaen Suleiman phys_addr = sg_dma_address(data->sg); 107236caa7cSMaen Suleiman mvsd_write(MVSD_SYS_ADDR_LOW, (u32)phys_addr & 0xffff); 108236caa7cSMaen Suleiman mvsd_write(MVSD_SYS_ADDR_HI, (u32)phys_addr >> 16); 109236caa7cSMaen Suleiman return 0; 110236caa7cSMaen Suleiman } 111236caa7cSMaen Suleiman } 112236caa7cSMaen Suleiman 113236caa7cSMaen Suleiman static void mvsd_request(struct mmc_host *mmc, struct mmc_request *mrq) 114236caa7cSMaen Suleiman { 115236caa7cSMaen Suleiman struct mvsd_host *host = mmc_priv(mmc); 116236caa7cSMaen Suleiman void __iomem *iobase = host->base; 117236caa7cSMaen Suleiman struct mmc_command *cmd = mrq->cmd; 118236caa7cSMaen Suleiman u32 cmdreg = 0, xfer = 0, intr = 0; 119236caa7cSMaen Suleiman unsigned long flags; 120236caa7cSMaen Suleiman 121236caa7cSMaen Suleiman BUG_ON(host->mrq != NULL); 122236caa7cSMaen Suleiman host->mrq = mrq; 123236caa7cSMaen Suleiman 124236caa7cSMaen Suleiman dev_dbg(host->dev, "cmd %d (hw state 0x%04x)\n", 125236caa7cSMaen Suleiman cmd->opcode, mvsd_read(MVSD_HW_STATE)); 126236caa7cSMaen Suleiman 127236caa7cSMaen Suleiman cmdreg = MVSD_CMD_INDEX(cmd->opcode); 128236caa7cSMaen Suleiman 129236caa7cSMaen Suleiman if (cmd->flags & MMC_RSP_BUSY) 130236caa7cSMaen Suleiman cmdreg |= MVSD_CMD_RSP_48BUSY; 131236caa7cSMaen Suleiman else if (cmd->flags & MMC_RSP_136) 132236caa7cSMaen Suleiman cmdreg |= MVSD_CMD_RSP_136; 133236caa7cSMaen Suleiman else if (cmd->flags & MMC_RSP_PRESENT) 134236caa7cSMaen Suleiman cmdreg |= MVSD_CMD_RSP_48; 135236caa7cSMaen Suleiman else 136236caa7cSMaen Suleiman cmdreg |= MVSD_CMD_RSP_NONE; 137236caa7cSMaen Suleiman 138236caa7cSMaen Suleiman if (cmd->flags & MMC_RSP_CRC) 139236caa7cSMaen Suleiman cmdreg |= MVSD_CMD_CHECK_CMDCRC; 140236caa7cSMaen Suleiman 141236caa7cSMaen Suleiman if (cmd->flags & MMC_RSP_OPCODE) 142236caa7cSMaen Suleiman cmdreg |= MVSD_CMD_INDX_CHECK; 143236caa7cSMaen Suleiman 144236caa7cSMaen Suleiman if (cmd->flags & MMC_RSP_PRESENT) { 145236caa7cSMaen Suleiman cmdreg |= MVSD_UNEXPECTED_RESP; 146236caa7cSMaen Suleiman intr |= MVSD_NOR_UNEXP_RSP; 147236caa7cSMaen Suleiman } 148236caa7cSMaen Suleiman 149236caa7cSMaen Suleiman if (mrq->data) { 150236caa7cSMaen Suleiman struct mmc_data *data = mrq->data; 151236caa7cSMaen Suleiman int pio; 152236caa7cSMaen Suleiman 153236caa7cSMaen Suleiman cmdreg |= MVSD_CMD_DATA_PRESENT | MVSD_CMD_CHECK_DATACRC16; 154236caa7cSMaen Suleiman xfer |= MVSD_XFER_MODE_HW_WR_DATA_EN; 155236caa7cSMaen Suleiman if (data->flags & MMC_DATA_READ) 156236caa7cSMaen Suleiman xfer |= MVSD_XFER_MODE_TO_HOST; 157236caa7cSMaen Suleiman 158236caa7cSMaen Suleiman pio = mvsd_setup_data(host, data); 159236caa7cSMaen Suleiman if (pio) { 160236caa7cSMaen Suleiman xfer |= MVSD_XFER_MODE_PIO; 161236caa7cSMaen Suleiman /* PIO section of mvsd_irq has comments on those bits */ 162236caa7cSMaen Suleiman if (data->flags & MMC_DATA_WRITE) 163236caa7cSMaen Suleiman intr |= MVSD_NOR_TX_AVAIL; 164236caa7cSMaen Suleiman else if (host->pio_size > 32) 165236caa7cSMaen Suleiman intr |= MVSD_NOR_RX_FIFO_8W; 166236caa7cSMaen Suleiman else 167236caa7cSMaen Suleiman intr |= MVSD_NOR_RX_READY; 168236caa7cSMaen Suleiman } 169236caa7cSMaen Suleiman 170236caa7cSMaen Suleiman if (data->stop) { 171236caa7cSMaen Suleiman struct mmc_command *stop = data->stop; 172236caa7cSMaen Suleiman u32 cmd12reg = 0; 173236caa7cSMaen Suleiman 174236caa7cSMaen Suleiman mvsd_write(MVSD_AUTOCMD12_ARG_LOW, stop->arg & 0xffff); 175236caa7cSMaen Suleiman mvsd_write(MVSD_AUTOCMD12_ARG_HI, stop->arg >> 16); 176236caa7cSMaen Suleiman 177236caa7cSMaen Suleiman if (stop->flags & MMC_RSP_BUSY) 178236caa7cSMaen Suleiman cmd12reg |= MVSD_AUTOCMD12_BUSY; 179236caa7cSMaen Suleiman if (stop->flags & MMC_RSP_OPCODE) 180236caa7cSMaen Suleiman cmd12reg |= MVSD_AUTOCMD12_INDX_CHECK; 181236caa7cSMaen Suleiman cmd12reg |= MVSD_AUTOCMD12_INDEX(stop->opcode); 182236caa7cSMaen Suleiman mvsd_write(MVSD_AUTOCMD12_CMD, cmd12reg); 183236caa7cSMaen Suleiman 184236caa7cSMaen Suleiman xfer |= MVSD_XFER_MODE_AUTO_CMD12; 185236caa7cSMaen Suleiman intr |= MVSD_NOR_AUTOCMD12_DONE; 186236caa7cSMaen Suleiman } else { 187236caa7cSMaen Suleiman intr |= MVSD_NOR_XFER_DONE; 188236caa7cSMaen Suleiman } 189236caa7cSMaen Suleiman } else { 190236caa7cSMaen Suleiman intr |= MVSD_NOR_CMD_DONE; 191236caa7cSMaen Suleiman } 192236caa7cSMaen Suleiman 193236caa7cSMaen Suleiman mvsd_write(MVSD_ARG_LOW, cmd->arg & 0xffff); 194236caa7cSMaen Suleiman mvsd_write(MVSD_ARG_HI, cmd->arg >> 16); 195236caa7cSMaen Suleiman 196236caa7cSMaen Suleiman spin_lock_irqsave(&host->lock, flags); 197236caa7cSMaen Suleiman 198236caa7cSMaen Suleiman host->xfer_mode &= MVSD_XFER_MODE_INT_CHK_EN; 199236caa7cSMaen Suleiman host->xfer_mode |= xfer; 200236caa7cSMaen Suleiman mvsd_write(MVSD_XFER_MODE, host->xfer_mode); 201236caa7cSMaen Suleiman 202236caa7cSMaen Suleiman mvsd_write(MVSD_NOR_INTR_STATUS, ~MVSD_NOR_CARD_INT); 203236caa7cSMaen Suleiman mvsd_write(MVSD_ERR_INTR_STATUS, 0xffff); 204236caa7cSMaen Suleiman mvsd_write(MVSD_CMD, cmdreg); 205236caa7cSMaen Suleiman 206236caa7cSMaen Suleiman host->intr_en &= MVSD_NOR_CARD_INT; 207236caa7cSMaen Suleiman host->intr_en |= intr | MVSD_NOR_ERROR; 208236caa7cSMaen Suleiman mvsd_write(MVSD_NOR_INTR_EN, host->intr_en); 209236caa7cSMaen Suleiman mvsd_write(MVSD_ERR_INTR_EN, 0xffff); 210236caa7cSMaen Suleiman 211236caa7cSMaen Suleiman mod_timer(&host->timer, jiffies + 5 * HZ); 212236caa7cSMaen Suleiman 213236caa7cSMaen Suleiman spin_unlock_irqrestore(&host->lock, flags); 214236caa7cSMaen Suleiman } 215236caa7cSMaen Suleiman 216236caa7cSMaen Suleiman static u32 mvsd_finish_cmd(struct mvsd_host *host, struct mmc_command *cmd, 217236caa7cSMaen Suleiman u32 err_status) 218236caa7cSMaen Suleiman { 219236caa7cSMaen Suleiman void __iomem *iobase = host->base; 220236caa7cSMaen Suleiman 221236caa7cSMaen Suleiman if (cmd->flags & MMC_RSP_136) { 222236caa7cSMaen Suleiman unsigned int response[8], i; 223236caa7cSMaen Suleiman for (i = 0; i < 8; i++) 224236caa7cSMaen Suleiman response[i] = mvsd_read(MVSD_RSP(i)); 225236caa7cSMaen Suleiman cmd->resp[0] = ((response[0] & 0x03ff) << 22) | 226236caa7cSMaen Suleiman ((response[1] & 0xffff) << 6) | 227236caa7cSMaen Suleiman ((response[2] & 0xfc00) >> 10); 228236caa7cSMaen Suleiman cmd->resp[1] = ((response[2] & 0x03ff) << 22) | 229236caa7cSMaen Suleiman ((response[3] & 0xffff) << 6) | 230236caa7cSMaen Suleiman ((response[4] & 0xfc00) >> 10); 231236caa7cSMaen Suleiman cmd->resp[2] = ((response[4] & 0x03ff) << 22) | 232236caa7cSMaen Suleiman ((response[5] & 0xffff) << 6) | 233236caa7cSMaen Suleiman ((response[6] & 0xfc00) >> 10); 234236caa7cSMaen Suleiman cmd->resp[3] = ((response[6] & 0x03ff) << 22) | 235236caa7cSMaen Suleiman ((response[7] & 0x3fff) << 8); 236236caa7cSMaen Suleiman } else if (cmd->flags & MMC_RSP_PRESENT) { 237236caa7cSMaen Suleiman unsigned int response[3], i; 238236caa7cSMaen Suleiman for (i = 0; i < 3; i++) 239236caa7cSMaen Suleiman response[i] = mvsd_read(MVSD_RSP(i)); 240236caa7cSMaen Suleiman cmd->resp[0] = ((response[2] & 0x003f) << (8 - 8)) | 241236caa7cSMaen Suleiman ((response[1] & 0xffff) << (14 - 8)) | 242236caa7cSMaen Suleiman ((response[0] & 0x03ff) << (30 - 8)); 243236caa7cSMaen Suleiman cmd->resp[1] = ((response[0] & 0xfc00) >> 10); 244236caa7cSMaen Suleiman cmd->resp[2] = 0; 245236caa7cSMaen Suleiman cmd->resp[3] = 0; 246236caa7cSMaen Suleiman } 247236caa7cSMaen Suleiman 248236caa7cSMaen Suleiman if (err_status & MVSD_ERR_CMD_TIMEOUT) { 249236caa7cSMaen Suleiman cmd->error = -ETIMEDOUT; 250236caa7cSMaen Suleiman } else if (err_status & (MVSD_ERR_CMD_CRC | MVSD_ERR_CMD_ENDBIT | 251236caa7cSMaen Suleiman MVSD_ERR_CMD_INDEX | MVSD_ERR_CMD_STARTBIT)) { 252236caa7cSMaen Suleiman cmd->error = -EILSEQ; 253236caa7cSMaen Suleiman } 254236caa7cSMaen Suleiman err_status &= ~(MVSD_ERR_CMD_TIMEOUT | MVSD_ERR_CMD_CRC | 255236caa7cSMaen Suleiman MVSD_ERR_CMD_ENDBIT | MVSD_ERR_CMD_INDEX | 256236caa7cSMaen Suleiman MVSD_ERR_CMD_STARTBIT); 257236caa7cSMaen Suleiman 258236caa7cSMaen Suleiman return err_status; 259236caa7cSMaen Suleiman } 260236caa7cSMaen Suleiman 261236caa7cSMaen Suleiman static u32 mvsd_finish_data(struct mvsd_host *host, struct mmc_data *data, 262236caa7cSMaen Suleiman u32 err_status) 263236caa7cSMaen Suleiman { 264236caa7cSMaen Suleiman void __iomem *iobase = host->base; 265236caa7cSMaen Suleiman 266236caa7cSMaen Suleiman if (host->pio_ptr) { 267236caa7cSMaen Suleiman host->pio_ptr = NULL; 268236caa7cSMaen Suleiman host->pio_size = 0; 269236caa7cSMaen Suleiman } else { 270236caa7cSMaen Suleiman dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->sg_frags, 271236caa7cSMaen Suleiman (data->flags & MMC_DATA_READ) ? 272236caa7cSMaen Suleiman DMA_FROM_DEVICE : DMA_TO_DEVICE); 273236caa7cSMaen Suleiman } 274236caa7cSMaen Suleiman 275236caa7cSMaen Suleiman if (err_status & MVSD_ERR_DATA_TIMEOUT) 276236caa7cSMaen Suleiman data->error = -ETIMEDOUT; 277236caa7cSMaen Suleiman else if (err_status & (MVSD_ERR_DATA_CRC | MVSD_ERR_DATA_ENDBIT)) 278236caa7cSMaen Suleiman data->error = -EILSEQ; 279236caa7cSMaen Suleiman else if (err_status & MVSD_ERR_XFER_SIZE) 280236caa7cSMaen Suleiman data->error = -EBADE; 281236caa7cSMaen Suleiman err_status &= ~(MVSD_ERR_DATA_TIMEOUT | MVSD_ERR_DATA_CRC | 282236caa7cSMaen Suleiman MVSD_ERR_DATA_ENDBIT | MVSD_ERR_XFER_SIZE); 283236caa7cSMaen Suleiman 284236caa7cSMaen Suleiman dev_dbg(host->dev, "data done: blocks_left=%d, bytes_left=%d\n", 285236caa7cSMaen Suleiman mvsd_read(MVSD_CURR_BLK_LEFT), mvsd_read(MVSD_CURR_BYTE_LEFT)); 286236caa7cSMaen Suleiman data->bytes_xfered = 287236caa7cSMaen Suleiman (data->blocks - mvsd_read(MVSD_CURR_BLK_LEFT)) * data->blksz; 288236caa7cSMaen Suleiman /* We can't be sure about the last block when errors are detected */ 289236caa7cSMaen Suleiman if (data->bytes_xfered && data->error) 290236caa7cSMaen Suleiman data->bytes_xfered -= data->blksz; 291236caa7cSMaen Suleiman 292236caa7cSMaen Suleiman /* Handle Auto cmd 12 response */ 293236caa7cSMaen Suleiman if (data->stop) { 294236caa7cSMaen Suleiman unsigned int response[3], i; 295236caa7cSMaen Suleiman for (i = 0; i < 3; i++) 296236caa7cSMaen Suleiman response[i] = mvsd_read(MVSD_AUTO_RSP(i)); 297236caa7cSMaen Suleiman data->stop->resp[0] = ((response[2] & 0x003f) << (8 - 8)) | 298236caa7cSMaen Suleiman ((response[1] & 0xffff) << (14 - 8)) | 299236caa7cSMaen Suleiman ((response[0] & 0x03ff) << (30 - 8)); 300236caa7cSMaen Suleiman data->stop->resp[1] = ((response[0] & 0xfc00) >> 10); 301236caa7cSMaen Suleiman data->stop->resp[2] = 0; 302236caa7cSMaen Suleiman data->stop->resp[3] = 0; 303236caa7cSMaen Suleiman 304236caa7cSMaen Suleiman if (err_status & MVSD_ERR_AUTOCMD12) { 305236caa7cSMaen Suleiman u32 err_cmd12 = mvsd_read(MVSD_AUTOCMD12_ERR_STATUS); 306236caa7cSMaen Suleiman dev_dbg(host->dev, "c12err 0x%04x\n", err_cmd12); 307236caa7cSMaen Suleiman if (err_cmd12 & MVSD_AUTOCMD12_ERR_NOTEXE) 308236caa7cSMaen Suleiman data->stop->error = -ENOEXEC; 309236caa7cSMaen Suleiman else if (err_cmd12 & MVSD_AUTOCMD12_ERR_TIMEOUT) 310236caa7cSMaen Suleiman data->stop->error = -ETIMEDOUT; 311236caa7cSMaen Suleiman else if (err_cmd12) 312236caa7cSMaen Suleiman data->stop->error = -EILSEQ; 313236caa7cSMaen Suleiman err_status &= ~MVSD_ERR_AUTOCMD12; 314236caa7cSMaen Suleiman } 315236caa7cSMaen Suleiman } 316236caa7cSMaen Suleiman 317236caa7cSMaen Suleiman return err_status; 318236caa7cSMaen Suleiman } 319236caa7cSMaen Suleiman 320236caa7cSMaen Suleiman static irqreturn_t mvsd_irq(int irq, void *dev) 321236caa7cSMaen Suleiman { 322236caa7cSMaen Suleiman struct mvsd_host *host = dev; 323236caa7cSMaen Suleiman void __iomem *iobase = host->base; 324236caa7cSMaen Suleiman u32 intr_status, intr_done_mask; 325236caa7cSMaen Suleiman int irq_handled = 0; 326236caa7cSMaen Suleiman 327236caa7cSMaen Suleiman intr_status = mvsd_read(MVSD_NOR_INTR_STATUS); 328236caa7cSMaen Suleiman dev_dbg(host->dev, "intr 0x%04x intr_en 0x%04x hw_state 0x%04x\n", 329236caa7cSMaen Suleiman intr_status, mvsd_read(MVSD_NOR_INTR_EN), 330236caa7cSMaen Suleiman mvsd_read(MVSD_HW_STATE)); 331236caa7cSMaen Suleiman 332236caa7cSMaen Suleiman spin_lock(&host->lock); 333236caa7cSMaen Suleiman 334236caa7cSMaen Suleiman /* PIO handling, if needed. Messy business... */ 335236caa7cSMaen Suleiman if (host->pio_size && 336236caa7cSMaen Suleiman (intr_status & host->intr_en & 337236caa7cSMaen Suleiman (MVSD_NOR_RX_READY | MVSD_NOR_RX_FIFO_8W))) { 338236caa7cSMaen Suleiman u16 *p = host->pio_ptr; 339236caa7cSMaen Suleiman int s = host->pio_size; 340236caa7cSMaen Suleiman while (s >= 32 && (intr_status & MVSD_NOR_RX_FIFO_8W)) { 341236caa7cSMaen Suleiman readsw(iobase + MVSD_FIFO, p, 16); 342236caa7cSMaen Suleiman p += 16; 343236caa7cSMaen Suleiman s -= 32; 344236caa7cSMaen Suleiman intr_status = mvsd_read(MVSD_NOR_INTR_STATUS); 345236caa7cSMaen Suleiman } 346236caa7cSMaen Suleiman /* 347236caa7cSMaen Suleiman * Normally we'd use < 32 here, but the RX_FIFO_8W bit 348236caa7cSMaen Suleiman * doesn't appear to assert when there is exactly 32 bytes 349236caa7cSMaen Suleiman * (8 words) left to fetch in a transfer. 350236caa7cSMaen Suleiman */ 351236caa7cSMaen Suleiman if (s <= 32) { 352236caa7cSMaen Suleiman while (s >= 4 && (intr_status & MVSD_NOR_RX_READY)) { 353236caa7cSMaen Suleiman put_unaligned(mvsd_read(MVSD_FIFO), p++); 354236caa7cSMaen Suleiman put_unaligned(mvsd_read(MVSD_FIFO), p++); 355236caa7cSMaen Suleiman s -= 4; 356236caa7cSMaen Suleiman intr_status = mvsd_read(MVSD_NOR_INTR_STATUS); 357236caa7cSMaen Suleiman } 358236caa7cSMaen Suleiman if (s && s < 4 && (intr_status & MVSD_NOR_RX_READY)) { 359236caa7cSMaen Suleiman u16 val[2] = {0, 0}; 360236caa7cSMaen Suleiman val[0] = mvsd_read(MVSD_FIFO); 361236caa7cSMaen Suleiman val[1] = mvsd_read(MVSD_FIFO); 362236caa7cSMaen Suleiman memcpy(p, &val, s); 363236caa7cSMaen Suleiman s = 0; 364236caa7cSMaen Suleiman intr_status = mvsd_read(MVSD_NOR_INTR_STATUS); 365236caa7cSMaen Suleiman } 366236caa7cSMaen Suleiman if (s == 0) { 367236caa7cSMaen Suleiman host->intr_en &= 368236caa7cSMaen Suleiman ~(MVSD_NOR_RX_READY | MVSD_NOR_RX_FIFO_8W); 369236caa7cSMaen Suleiman mvsd_write(MVSD_NOR_INTR_EN, host->intr_en); 370236caa7cSMaen Suleiman } else if (host->intr_en & MVSD_NOR_RX_FIFO_8W) { 371236caa7cSMaen Suleiman host->intr_en &= ~MVSD_NOR_RX_FIFO_8W; 372236caa7cSMaen Suleiman host->intr_en |= MVSD_NOR_RX_READY; 373236caa7cSMaen Suleiman mvsd_write(MVSD_NOR_INTR_EN, host->intr_en); 374236caa7cSMaen Suleiman } 375236caa7cSMaen Suleiman } 376236caa7cSMaen Suleiman dev_dbg(host->dev, "pio %d intr 0x%04x hw_state 0x%04x\n", 377236caa7cSMaen Suleiman s, intr_status, mvsd_read(MVSD_HW_STATE)); 378236caa7cSMaen Suleiman host->pio_ptr = p; 379236caa7cSMaen Suleiman host->pio_size = s; 380236caa7cSMaen Suleiman irq_handled = 1; 381236caa7cSMaen Suleiman } else if (host->pio_size && 382236caa7cSMaen Suleiman (intr_status & host->intr_en & 383236caa7cSMaen Suleiman (MVSD_NOR_TX_AVAIL | MVSD_NOR_TX_FIFO_8W))) { 384236caa7cSMaen Suleiman u16 *p = host->pio_ptr; 385236caa7cSMaen Suleiman int s = host->pio_size; 386236caa7cSMaen Suleiman /* 387236caa7cSMaen Suleiman * The TX_FIFO_8W bit is unreliable. When set, bursting 388236caa7cSMaen Suleiman * 16 halfwords all at once in the FIFO drops data. Actually 389236caa7cSMaen Suleiman * TX_AVAIL does go off after only one word is pushed even if 390236caa7cSMaen Suleiman * TX_FIFO_8W remains set. 391236caa7cSMaen Suleiman */ 392236caa7cSMaen Suleiman while (s >= 4 && (intr_status & MVSD_NOR_TX_AVAIL)) { 393236caa7cSMaen Suleiman mvsd_write(MVSD_FIFO, get_unaligned(p++)); 394236caa7cSMaen Suleiman mvsd_write(MVSD_FIFO, get_unaligned(p++)); 395236caa7cSMaen Suleiman s -= 4; 396236caa7cSMaen Suleiman intr_status = mvsd_read(MVSD_NOR_INTR_STATUS); 397236caa7cSMaen Suleiman } 398236caa7cSMaen Suleiman if (s < 4) { 399236caa7cSMaen Suleiman if (s && (intr_status & MVSD_NOR_TX_AVAIL)) { 400236caa7cSMaen Suleiman u16 val[2] = {0, 0}; 401236caa7cSMaen Suleiman memcpy(&val, p, s); 402236caa7cSMaen Suleiman mvsd_write(MVSD_FIFO, val[0]); 403236caa7cSMaen Suleiman mvsd_write(MVSD_FIFO, val[1]); 404236caa7cSMaen Suleiman s = 0; 405236caa7cSMaen Suleiman intr_status = mvsd_read(MVSD_NOR_INTR_STATUS); 406236caa7cSMaen Suleiman } 407236caa7cSMaen Suleiman if (s == 0) { 408236caa7cSMaen Suleiman host->intr_en &= 409236caa7cSMaen Suleiman ~(MVSD_NOR_TX_AVAIL | MVSD_NOR_TX_FIFO_8W); 410236caa7cSMaen Suleiman mvsd_write(MVSD_NOR_INTR_EN, host->intr_en); 411236caa7cSMaen Suleiman } 412236caa7cSMaen Suleiman } 413236caa7cSMaen Suleiman dev_dbg(host->dev, "pio %d intr 0x%04x hw_state 0x%04x\n", 414236caa7cSMaen Suleiman s, intr_status, mvsd_read(MVSD_HW_STATE)); 415236caa7cSMaen Suleiman host->pio_ptr = p; 416236caa7cSMaen Suleiman host->pio_size = s; 417236caa7cSMaen Suleiman irq_handled = 1; 418236caa7cSMaen Suleiman } 419236caa7cSMaen Suleiman 420236caa7cSMaen Suleiman mvsd_write(MVSD_NOR_INTR_STATUS, intr_status); 421236caa7cSMaen Suleiman 422236caa7cSMaen Suleiman intr_done_mask = MVSD_NOR_CARD_INT | MVSD_NOR_RX_READY | 423236caa7cSMaen Suleiman MVSD_NOR_RX_FIFO_8W | MVSD_NOR_TX_FIFO_8W; 424236caa7cSMaen Suleiman if (intr_status & host->intr_en & ~intr_done_mask) { 425236caa7cSMaen Suleiman struct mmc_request *mrq = host->mrq; 426236caa7cSMaen Suleiman struct mmc_command *cmd = mrq->cmd; 427236caa7cSMaen Suleiman u32 err_status = 0; 428236caa7cSMaen Suleiman 429236caa7cSMaen Suleiman del_timer(&host->timer); 430236caa7cSMaen Suleiman host->mrq = NULL; 431236caa7cSMaen Suleiman 432236caa7cSMaen Suleiman host->intr_en &= MVSD_NOR_CARD_INT; 433236caa7cSMaen Suleiman mvsd_write(MVSD_NOR_INTR_EN, host->intr_en); 434236caa7cSMaen Suleiman mvsd_write(MVSD_ERR_INTR_EN, 0); 435236caa7cSMaen Suleiman 436236caa7cSMaen Suleiman spin_unlock(&host->lock); 437236caa7cSMaen Suleiman 438236caa7cSMaen Suleiman if (intr_status & MVSD_NOR_UNEXP_RSP) { 439236caa7cSMaen Suleiman cmd->error = -EPROTO; 440236caa7cSMaen Suleiman } else if (intr_status & MVSD_NOR_ERROR) { 441236caa7cSMaen Suleiman err_status = mvsd_read(MVSD_ERR_INTR_STATUS); 442236caa7cSMaen Suleiman dev_dbg(host->dev, "err 0x%04x\n", err_status); 443236caa7cSMaen Suleiman } 444236caa7cSMaen Suleiman 445236caa7cSMaen Suleiman err_status = mvsd_finish_cmd(host, cmd, err_status); 446236caa7cSMaen Suleiman if (mrq->data) 447236caa7cSMaen Suleiman err_status = mvsd_finish_data(host, mrq->data, err_status); 448236caa7cSMaen Suleiman if (err_status) { 449236caa7cSMaen Suleiman printk(KERN_ERR "%s: unhandled error status %#04x\n", 450236caa7cSMaen Suleiman mmc_hostname(host->mmc), err_status); 451236caa7cSMaen Suleiman cmd->error = -ENOMSG; 452236caa7cSMaen Suleiman } 453236caa7cSMaen Suleiman 454236caa7cSMaen Suleiman mmc_request_done(host->mmc, mrq); 455236caa7cSMaen Suleiman irq_handled = 1; 456236caa7cSMaen Suleiman } else 457236caa7cSMaen Suleiman spin_unlock(&host->lock); 458236caa7cSMaen Suleiman 459236caa7cSMaen Suleiman if (intr_status & MVSD_NOR_CARD_INT) { 460236caa7cSMaen Suleiman mmc_signal_sdio_irq(host->mmc); 461236caa7cSMaen Suleiman irq_handled = 1; 462236caa7cSMaen Suleiman } 463236caa7cSMaen Suleiman 464236caa7cSMaen Suleiman if (irq_handled) 465236caa7cSMaen Suleiman return IRQ_HANDLED; 466236caa7cSMaen Suleiman 467236caa7cSMaen Suleiman printk(KERN_ERR "%s: unhandled interrupt status=0x%04x en=0x%04x " 468236caa7cSMaen Suleiman "pio=%d\n", mmc_hostname(host->mmc), intr_status, 469236caa7cSMaen Suleiman host->intr_en, host->pio_size); 470236caa7cSMaen Suleiman return IRQ_NONE; 471236caa7cSMaen Suleiman } 472236caa7cSMaen Suleiman 473236caa7cSMaen Suleiman static void mvsd_timeout_timer(unsigned long data) 474236caa7cSMaen Suleiman { 475236caa7cSMaen Suleiman struct mvsd_host *host = (struct mvsd_host *)data; 476236caa7cSMaen Suleiman void __iomem *iobase = host->base; 477236caa7cSMaen Suleiman struct mmc_request *mrq; 478236caa7cSMaen Suleiman unsigned long flags; 479236caa7cSMaen Suleiman 480236caa7cSMaen Suleiman spin_lock_irqsave(&host->lock, flags); 481236caa7cSMaen Suleiman mrq = host->mrq; 482236caa7cSMaen Suleiman if (mrq) { 483236caa7cSMaen Suleiman printk(KERN_ERR "%s: Timeout waiting for hardware interrupt.\n", 484236caa7cSMaen Suleiman mmc_hostname(host->mmc)); 485236caa7cSMaen Suleiman printk(KERN_ERR "%s: hw_state=0x%04x, intr_status=0x%04x " 486236caa7cSMaen Suleiman "intr_en=0x%04x\n", mmc_hostname(host->mmc), 487236caa7cSMaen Suleiman mvsd_read(MVSD_HW_STATE), 488236caa7cSMaen Suleiman mvsd_read(MVSD_NOR_INTR_STATUS), 489236caa7cSMaen Suleiman mvsd_read(MVSD_NOR_INTR_EN)); 490236caa7cSMaen Suleiman 491236caa7cSMaen Suleiman host->mrq = NULL; 492236caa7cSMaen Suleiman 493236caa7cSMaen Suleiman mvsd_write(MVSD_SW_RESET, MVSD_SW_RESET_NOW); 494236caa7cSMaen Suleiman 495236caa7cSMaen Suleiman host->xfer_mode &= MVSD_XFER_MODE_INT_CHK_EN; 496236caa7cSMaen Suleiman mvsd_write(MVSD_XFER_MODE, host->xfer_mode); 497236caa7cSMaen Suleiman 498236caa7cSMaen Suleiman host->intr_en &= MVSD_NOR_CARD_INT; 499236caa7cSMaen Suleiman mvsd_write(MVSD_NOR_INTR_EN, host->intr_en); 500236caa7cSMaen Suleiman mvsd_write(MVSD_ERR_INTR_EN, 0); 501236caa7cSMaen Suleiman mvsd_write(MVSD_ERR_INTR_STATUS, 0xffff); 502236caa7cSMaen Suleiman 503236caa7cSMaen Suleiman mrq->cmd->error = -ETIMEDOUT; 504236caa7cSMaen Suleiman mvsd_finish_cmd(host, mrq->cmd, 0); 505236caa7cSMaen Suleiman if (mrq->data) { 506236caa7cSMaen Suleiman mrq->data->error = -ETIMEDOUT; 507236caa7cSMaen Suleiman mvsd_finish_data(host, mrq->data, 0); 508236caa7cSMaen Suleiman } 509236caa7cSMaen Suleiman } 510236caa7cSMaen Suleiman spin_unlock_irqrestore(&host->lock, flags); 511236caa7cSMaen Suleiman 512236caa7cSMaen Suleiman if (mrq) 513236caa7cSMaen Suleiman mmc_request_done(host->mmc, mrq); 514236caa7cSMaen Suleiman } 515236caa7cSMaen Suleiman 516236caa7cSMaen Suleiman static irqreturn_t mvsd_card_detect_irq(int irq, void *dev) 517236caa7cSMaen Suleiman { 518236caa7cSMaen Suleiman struct mvsd_host *host = dev; 519236caa7cSMaen Suleiman mmc_detect_change(host->mmc, msecs_to_jiffies(100)); 520236caa7cSMaen Suleiman return IRQ_HANDLED; 521236caa7cSMaen Suleiman } 522236caa7cSMaen Suleiman 523236caa7cSMaen Suleiman static void mvsd_enable_sdio_irq(struct mmc_host *mmc, int enable) 524236caa7cSMaen Suleiman { 525236caa7cSMaen Suleiman struct mvsd_host *host = mmc_priv(mmc); 526236caa7cSMaen Suleiman void __iomem *iobase = host->base; 527236caa7cSMaen Suleiman unsigned long flags; 528236caa7cSMaen Suleiman 529236caa7cSMaen Suleiman spin_lock_irqsave(&host->lock, flags); 530236caa7cSMaen Suleiman if (enable) { 531236caa7cSMaen Suleiman host->xfer_mode |= MVSD_XFER_MODE_INT_CHK_EN; 532236caa7cSMaen Suleiman host->intr_en |= MVSD_NOR_CARD_INT; 533236caa7cSMaen Suleiman } else { 534236caa7cSMaen Suleiman host->xfer_mode &= ~MVSD_XFER_MODE_INT_CHK_EN; 535236caa7cSMaen Suleiman host->intr_en &= ~MVSD_NOR_CARD_INT; 536236caa7cSMaen Suleiman } 537236caa7cSMaen Suleiman mvsd_write(MVSD_XFER_MODE, host->xfer_mode); 538236caa7cSMaen Suleiman mvsd_write(MVSD_NOR_INTR_EN, host->intr_en); 539236caa7cSMaen Suleiman spin_unlock_irqrestore(&host->lock, flags); 540236caa7cSMaen Suleiman } 541236caa7cSMaen Suleiman 542236caa7cSMaen Suleiman static int mvsd_get_ro(struct mmc_host *mmc) 543236caa7cSMaen Suleiman { 544236caa7cSMaen Suleiman struct mvsd_host *host = mmc_priv(mmc); 545236caa7cSMaen Suleiman 546236caa7cSMaen Suleiman if (host->gpio_write_protect) 547236caa7cSMaen Suleiman return gpio_get_value(host->gpio_write_protect); 548236caa7cSMaen Suleiman 549236caa7cSMaen Suleiman /* 550236caa7cSMaen Suleiman * Board doesn't support read only detection; let the mmc core 551236caa7cSMaen Suleiman * decide what to do. 552236caa7cSMaen Suleiman */ 553236caa7cSMaen Suleiman return -ENOSYS; 554236caa7cSMaen Suleiman } 555236caa7cSMaen Suleiman 556236caa7cSMaen Suleiman static void mvsd_power_up(struct mvsd_host *host) 557236caa7cSMaen Suleiman { 558236caa7cSMaen Suleiman void __iomem *iobase = host->base; 559236caa7cSMaen Suleiman dev_dbg(host->dev, "power up\n"); 560236caa7cSMaen Suleiman mvsd_write(MVSD_NOR_INTR_EN, 0); 561236caa7cSMaen Suleiman mvsd_write(MVSD_ERR_INTR_EN, 0); 562236caa7cSMaen Suleiman mvsd_write(MVSD_SW_RESET, MVSD_SW_RESET_NOW); 563236caa7cSMaen Suleiman mvsd_write(MVSD_XFER_MODE, 0); 564236caa7cSMaen Suleiman mvsd_write(MVSD_NOR_STATUS_EN, 0xffff); 565236caa7cSMaen Suleiman mvsd_write(MVSD_ERR_STATUS_EN, 0xffff); 566236caa7cSMaen Suleiman mvsd_write(MVSD_NOR_INTR_STATUS, 0xffff); 567236caa7cSMaen Suleiman mvsd_write(MVSD_ERR_INTR_STATUS, 0xffff); 568236caa7cSMaen Suleiman } 569236caa7cSMaen Suleiman 570236caa7cSMaen Suleiman static void mvsd_power_down(struct mvsd_host *host) 571236caa7cSMaen Suleiman { 572236caa7cSMaen Suleiman void __iomem *iobase = host->base; 573236caa7cSMaen Suleiman dev_dbg(host->dev, "power down\n"); 574236caa7cSMaen Suleiman mvsd_write(MVSD_NOR_INTR_EN, 0); 575236caa7cSMaen Suleiman mvsd_write(MVSD_ERR_INTR_EN, 0); 576236caa7cSMaen Suleiman mvsd_write(MVSD_SW_RESET, MVSD_SW_RESET_NOW); 577236caa7cSMaen Suleiman mvsd_write(MVSD_XFER_MODE, MVSD_XFER_MODE_STOP_CLK); 578236caa7cSMaen Suleiman mvsd_write(MVSD_NOR_STATUS_EN, 0); 579236caa7cSMaen Suleiman mvsd_write(MVSD_ERR_STATUS_EN, 0); 580236caa7cSMaen Suleiman mvsd_write(MVSD_NOR_INTR_STATUS, 0xffff); 581236caa7cSMaen Suleiman mvsd_write(MVSD_ERR_INTR_STATUS, 0xffff); 582236caa7cSMaen Suleiman } 583236caa7cSMaen Suleiman 584236caa7cSMaen Suleiman static void mvsd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 585236caa7cSMaen Suleiman { 586236caa7cSMaen Suleiman struct mvsd_host *host = mmc_priv(mmc); 587236caa7cSMaen Suleiman void __iomem *iobase = host->base; 588236caa7cSMaen Suleiman u32 ctrl_reg = 0; 589236caa7cSMaen Suleiman 590236caa7cSMaen Suleiman if (ios->power_mode == MMC_POWER_UP) 591236caa7cSMaen Suleiman mvsd_power_up(host); 592236caa7cSMaen Suleiman 593236caa7cSMaen Suleiman if (ios->clock == 0) { 594236caa7cSMaen Suleiman mvsd_write(MVSD_XFER_MODE, MVSD_XFER_MODE_STOP_CLK); 595236caa7cSMaen Suleiman mvsd_write(MVSD_CLK_DIV, MVSD_BASE_DIV_MAX); 596236caa7cSMaen Suleiman host->clock = 0; 597236caa7cSMaen Suleiman dev_dbg(host->dev, "clock off\n"); 598236caa7cSMaen Suleiman } else if (ios->clock != host->clock) { 599236caa7cSMaen Suleiman u32 m = DIV_ROUND_UP(host->base_clock, ios->clock) - 1; 600236caa7cSMaen Suleiman if (m > MVSD_BASE_DIV_MAX) 601236caa7cSMaen Suleiman m = MVSD_BASE_DIV_MAX; 602236caa7cSMaen Suleiman mvsd_write(MVSD_CLK_DIV, m); 603236caa7cSMaen Suleiman host->clock = ios->clock; 604236caa7cSMaen Suleiman host->ns_per_clk = 1000000000 / (host->base_clock / (m+1)); 605236caa7cSMaen Suleiman dev_dbg(host->dev, "clock=%d (%d), div=0x%04x\n", 606236caa7cSMaen Suleiman ios->clock, host->base_clock / (m+1), m); 607236caa7cSMaen Suleiman } 608236caa7cSMaen Suleiman 609236caa7cSMaen Suleiman /* default transfer mode */ 610236caa7cSMaen Suleiman ctrl_reg |= MVSD_HOST_CTRL_BIG_ENDIAN; 611236caa7cSMaen Suleiman ctrl_reg &= ~MVSD_HOST_CTRL_LSB_FIRST; 612236caa7cSMaen Suleiman 613236caa7cSMaen Suleiman /* default to maximum timeout */ 614236caa7cSMaen Suleiman ctrl_reg |= MVSD_HOST_CTRL_TMOUT_MASK; 615236caa7cSMaen Suleiman ctrl_reg |= MVSD_HOST_CTRL_TMOUT_EN; 616236caa7cSMaen Suleiman 617236caa7cSMaen Suleiman if (ios->bus_mode == MMC_BUSMODE_PUSHPULL) 618236caa7cSMaen Suleiman ctrl_reg |= MVSD_HOST_CTRL_PUSH_PULL_EN; 619236caa7cSMaen Suleiman 620236caa7cSMaen Suleiman if (ios->bus_width == MMC_BUS_WIDTH_4) 621236caa7cSMaen Suleiman ctrl_reg |= MVSD_HOST_CTRL_DATA_WIDTH_4_BITS; 622236caa7cSMaen Suleiman 623236caa7cSMaen Suleiman if (ios->timing == MMC_TIMING_MMC_HS || 624236caa7cSMaen Suleiman ios->timing == MMC_TIMING_SD_HS) 625236caa7cSMaen Suleiman ctrl_reg |= MVSD_HOST_CTRL_HI_SPEED_EN; 626236caa7cSMaen Suleiman 627236caa7cSMaen Suleiman host->ctrl = ctrl_reg; 628236caa7cSMaen Suleiman mvsd_write(MVSD_HOST_CTRL, ctrl_reg); 629236caa7cSMaen Suleiman dev_dbg(host->dev, "ctrl 0x%04x: %s %s %s\n", ctrl_reg, 630236caa7cSMaen Suleiman (ctrl_reg & MVSD_HOST_CTRL_PUSH_PULL_EN) ? 631236caa7cSMaen Suleiman "push-pull" : "open-drain", 632236caa7cSMaen Suleiman (ctrl_reg & MVSD_HOST_CTRL_DATA_WIDTH_4_BITS) ? 633236caa7cSMaen Suleiman "4bit-width" : "1bit-width", 634236caa7cSMaen Suleiman (ctrl_reg & MVSD_HOST_CTRL_HI_SPEED_EN) ? 635236caa7cSMaen Suleiman "high-speed" : ""); 636236caa7cSMaen Suleiman 637236caa7cSMaen Suleiman if (ios->power_mode == MMC_POWER_OFF) 638236caa7cSMaen Suleiman mvsd_power_down(host); 639236caa7cSMaen Suleiman } 640236caa7cSMaen Suleiman 641236caa7cSMaen Suleiman static const struct mmc_host_ops mvsd_ops = { 642236caa7cSMaen Suleiman .request = mvsd_request, 643236caa7cSMaen Suleiman .get_ro = mvsd_get_ro, 644236caa7cSMaen Suleiman .set_ios = mvsd_set_ios, 645236caa7cSMaen Suleiman .enable_sdio_irq = mvsd_enable_sdio_irq, 646236caa7cSMaen Suleiman }; 647236caa7cSMaen Suleiman 648236caa7cSMaen Suleiman static void __init mv_conf_mbus_windows(struct mvsd_host *host, 649236caa7cSMaen Suleiman struct mbus_dram_target_info *dram) 650236caa7cSMaen Suleiman { 651236caa7cSMaen Suleiman void __iomem *iobase = host->base; 652236caa7cSMaen Suleiman int i; 653236caa7cSMaen Suleiman 654236caa7cSMaen Suleiman for (i = 0; i < 4; i++) { 655236caa7cSMaen Suleiman writel(0, iobase + MVSD_WINDOW_CTRL(i)); 656236caa7cSMaen Suleiman writel(0, iobase + MVSD_WINDOW_BASE(i)); 657236caa7cSMaen Suleiman } 658236caa7cSMaen Suleiman 659236caa7cSMaen Suleiman for (i = 0; i < dram->num_cs; i++) { 660236caa7cSMaen Suleiman struct mbus_dram_window *cs = dram->cs + i; 661236caa7cSMaen Suleiman writel(((cs->size - 1) & 0xffff0000) | 662236caa7cSMaen Suleiman (cs->mbus_attr << 8) | 663236caa7cSMaen Suleiman (dram->mbus_dram_target_id << 4) | 1, 664236caa7cSMaen Suleiman iobase + MVSD_WINDOW_CTRL(i)); 665236caa7cSMaen Suleiman writel(cs->base, iobase + MVSD_WINDOW_BASE(i)); 666236caa7cSMaen Suleiman } 667236caa7cSMaen Suleiman } 668236caa7cSMaen Suleiman 669236caa7cSMaen Suleiman static int __init mvsd_probe(struct platform_device *pdev) 670236caa7cSMaen Suleiman { 671236caa7cSMaen Suleiman struct mmc_host *mmc = NULL; 672236caa7cSMaen Suleiman struct mvsd_host *host = NULL; 673236caa7cSMaen Suleiman const struct mvsdio_platform_data *mvsd_data; 674236caa7cSMaen Suleiman struct resource *r; 675236caa7cSMaen Suleiman int ret, irq; 676236caa7cSMaen Suleiman 677236caa7cSMaen Suleiman r = platform_get_resource(pdev, IORESOURCE_MEM, 0); 678236caa7cSMaen Suleiman irq = platform_get_irq(pdev, 0); 679236caa7cSMaen Suleiman mvsd_data = pdev->dev.platform_data; 680236caa7cSMaen Suleiman if (!r || irq < 0 || !mvsd_data) 681236caa7cSMaen Suleiman return -ENXIO; 682236caa7cSMaen Suleiman 683236caa7cSMaen Suleiman r = request_mem_region(r->start, SZ_1K, DRIVER_NAME); 684236caa7cSMaen Suleiman if (!r) 685236caa7cSMaen Suleiman return -EBUSY; 686236caa7cSMaen Suleiman 687236caa7cSMaen Suleiman mmc = mmc_alloc_host(sizeof(struct mvsd_host), &pdev->dev); 688236caa7cSMaen Suleiman if (!mmc) { 689236caa7cSMaen Suleiman ret = -ENOMEM; 690236caa7cSMaen Suleiman goto out; 691236caa7cSMaen Suleiman } 692236caa7cSMaen Suleiman 693236caa7cSMaen Suleiman host = mmc_priv(mmc); 694236caa7cSMaen Suleiman host->mmc = mmc; 695236caa7cSMaen Suleiman host->dev = &pdev->dev; 696236caa7cSMaen Suleiman host->res = r; 697236caa7cSMaen Suleiman host->base_clock = mvsd_data->clock / 2; 698236caa7cSMaen Suleiman 699236caa7cSMaen Suleiman mmc->ops = &mvsd_ops; 700236caa7cSMaen Suleiman 701236caa7cSMaen Suleiman mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; 702236caa7cSMaen Suleiman mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ | 703236caa7cSMaen Suleiman MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED; 704236caa7cSMaen Suleiman 705236caa7cSMaen Suleiman mmc->f_min = DIV_ROUND_UP(host->base_clock, MVSD_BASE_DIV_MAX); 706236caa7cSMaen Suleiman mmc->f_max = maxfreq; 707236caa7cSMaen Suleiman 708236caa7cSMaen Suleiman mmc->max_blk_size = 2048; 709236caa7cSMaen Suleiman mmc->max_blk_count = 65535; 710236caa7cSMaen Suleiman 711236caa7cSMaen Suleiman mmc->max_hw_segs = 1; 712236caa7cSMaen Suleiman mmc->max_phys_segs = 1; 713236caa7cSMaen Suleiman mmc->max_seg_size = mmc->max_blk_size * mmc->max_blk_count; 714236caa7cSMaen Suleiman mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; 715236caa7cSMaen Suleiman 716236caa7cSMaen Suleiman spin_lock_init(&host->lock); 717236caa7cSMaen Suleiman 718236caa7cSMaen Suleiman host->base = ioremap(r->start, SZ_4K); 719236caa7cSMaen Suleiman if (!host->base) { 720236caa7cSMaen Suleiman ret = -ENOMEM; 721236caa7cSMaen Suleiman goto out; 722236caa7cSMaen Suleiman } 723236caa7cSMaen Suleiman 724236caa7cSMaen Suleiman /* (Re-)program MBUS remapping windows if we are asked to. */ 725236caa7cSMaen Suleiman if (mvsd_data->dram != NULL) 726236caa7cSMaen Suleiman mv_conf_mbus_windows(host, mvsd_data->dram); 727236caa7cSMaen Suleiman 728236caa7cSMaen Suleiman mvsd_power_down(host); 729236caa7cSMaen Suleiman 730236caa7cSMaen Suleiman ret = request_irq(irq, mvsd_irq, 0, DRIVER_NAME, host); 731236caa7cSMaen Suleiman if (ret) { 732236caa7cSMaen Suleiman printk(KERN_ERR "%s: cannot assign irq %d\n", DRIVER_NAME, irq); 733236caa7cSMaen Suleiman goto out; 734236caa7cSMaen Suleiman } else 735236caa7cSMaen Suleiman host->irq = irq; 736236caa7cSMaen Suleiman 737236caa7cSMaen Suleiman if (mvsd_data->gpio_card_detect) { 738236caa7cSMaen Suleiman ret = gpio_request(mvsd_data->gpio_card_detect, 739236caa7cSMaen Suleiman DRIVER_NAME " cd"); 740236caa7cSMaen Suleiman if (ret == 0) { 741236caa7cSMaen Suleiman gpio_direction_input(mvsd_data->gpio_card_detect); 742236caa7cSMaen Suleiman irq = gpio_to_irq(mvsd_data->gpio_card_detect); 743236caa7cSMaen Suleiman ret = request_irq(irq, mvsd_card_detect_irq, 744236caa7cSMaen Suleiman IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING, 745236caa7cSMaen Suleiman DRIVER_NAME " cd", host); 746236caa7cSMaen Suleiman if (ret == 0) 747236caa7cSMaen Suleiman host->gpio_card_detect = 748236caa7cSMaen Suleiman mvsd_data->gpio_card_detect; 749236caa7cSMaen Suleiman else 750236caa7cSMaen Suleiman gpio_free(mvsd_data->gpio_card_detect); 751236caa7cSMaen Suleiman } 752236caa7cSMaen Suleiman } 753236caa7cSMaen Suleiman if (!host->gpio_card_detect) 754236caa7cSMaen Suleiman mmc->caps |= MMC_CAP_NEEDS_POLL; 755236caa7cSMaen Suleiman 756236caa7cSMaen Suleiman if (mvsd_data->gpio_write_protect) { 757236caa7cSMaen Suleiman ret = gpio_request(mvsd_data->gpio_write_protect, 758236caa7cSMaen Suleiman DRIVER_NAME " wp"); 759236caa7cSMaen Suleiman if (ret == 0) { 760236caa7cSMaen Suleiman gpio_direction_input(mvsd_data->gpio_write_protect); 761236caa7cSMaen Suleiman host->gpio_write_protect = 762236caa7cSMaen Suleiman mvsd_data->gpio_write_protect; 763236caa7cSMaen Suleiman } 764236caa7cSMaen Suleiman } 765236caa7cSMaen Suleiman 766236caa7cSMaen Suleiman setup_timer(&host->timer, mvsd_timeout_timer, (unsigned long)host); 767236caa7cSMaen Suleiman platform_set_drvdata(pdev, mmc); 768236caa7cSMaen Suleiman ret = mmc_add_host(mmc); 769236caa7cSMaen Suleiman if (ret) 770236caa7cSMaen Suleiman goto out; 771236caa7cSMaen Suleiman 772236caa7cSMaen Suleiman printk(KERN_NOTICE "%s: %s driver initialized, ", 773236caa7cSMaen Suleiman mmc_hostname(mmc), DRIVER_NAME); 774236caa7cSMaen Suleiman if (host->gpio_card_detect) 775236caa7cSMaen Suleiman printk("using GPIO %d for card detection\n", 776236caa7cSMaen Suleiman host->gpio_card_detect); 777236caa7cSMaen Suleiman else 778236caa7cSMaen Suleiman printk("lacking card detect (fall back to polling)\n"); 779236caa7cSMaen Suleiman return 0; 780236caa7cSMaen Suleiman 781236caa7cSMaen Suleiman out: 782236caa7cSMaen Suleiman if (host) { 783236caa7cSMaen Suleiman if (host->irq) 784236caa7cSMaen Suleiman free_irq(host->irq, host); 785236caa7cSMaen Suleiman if (host->gpio_card_detect) { 786236caa7cSMaen Suleiman free_irq(gpio_to_irq(host->gpio_card_detect), host); 787236caa7cSMaen Suleiman gpio_free(host->gpio_card_detect); 788236caa7cSMaen Suleiman } 789236caa7cSMaen Suleiman if (host->gpio_write_protect) 790236caa7cSMaen Suleiman gpio_free(host->gpio_write_protect); 791236caa7cSMaen Suleiman if (host->base) 792236caa7cSMaen Suleiman iounmap(host->base); 793236caa7cSMaen Suleiman } 794236caa7cSMaen Suleiman if (r) 795236caa7cSMaen Suleiman release_resource(r); 796236caa7cSMaen Suleiman if (mmc) 797236caa7cSMaen Suleiman mmc_free_host(mmc); 798236caa7cSMaen Suleiman 799236caa7cSMaen Suleiman return ret; 800236caa7cSMaen Suleiman } 801236caa7cSMaen Suleiman 802236caa7cSMaen Suleiman static int __exit mvsd_remove(struct platform_device *pdev) 803236caa7cSMaen Suleiman { 804236caa7cSMaen Suleiman struct mmc_host *mmc = platform_get_drvdata(pdev); 805236caa7cSMaen Suleiman 806236caa7cSMaen Suleiman if (mmc) { 807236caa7cSMaen Suleiman struct mvsd_host *host = mmc_priv(mmc); 808236caa7cSMaen Suleiman 809236caa7cSMaen Suleiman if (host->gpio_card_detect) { 810236caa7cSMaen Suleiman free_irq(gpio_to_irq(host->gpio_card_detect), host); 811236caa7cSMaen Suleiman gpio_free(host->gpio_card_detect); 812236caa7cSMaen Suleiman } 813236caa7cSMaen Suleiman mmc_remove_host(mmc); 814236caa7cSMaen Suleiman free_irq(host->irq, host); 815236caa7cSMaen Suleiman if (host->gpio_write_protect) 816236caa7cSMaen Suleiman gpio_free(host->gpio_write_protect); 817236caa7cSMaen Suleiman del_timer_sync(&host->timer); 818236caa7cSMaen Suleiman mvsd_power_down(host); 819236caa7cSMaen Suleiman iounmap(host->base); 820236caa7cSMaen Suleiman release_resource(host->res); 821236caa7cSMaen Suleiman mmc_free_host(mmc); 822236caa7cSMaen Suleiman } 823236caa7cSMaen Suleiman platform_set_drvdata(pdev, NULL); 824236caa7cSMaen Suleiman return 0; 825236caa7cSMaen Suleiman } 826236caa7cSMaen Suleiman 827236caa7cSMaen Suleiman #ifdef CONFIG_PM 8282e058a6fSRabin Vincent static int mvsd_suspend(struct platform_device *dev, pm_message_t state) 829236caa7cSMaen Suleiman { 830236caa7cSMaen Suleiman struct mmc_host *mmc = platform_get_drvdata(dev); 831236caa7cSMaen Suleiman int ret = 0; 832236caa7cSMaen Suleiman 8332e058a6fSRabin Vincent if (mmc) 834236caa7cSMaen Suleiman ret = mmc_suspend_host(mmc, state); 835236caa7cSMaen Suleiman 836236caa7cSMaen Suleiman return ret; 837236caa7cSMaen Suleiman } 838236caa7cSMaen Suleiman 8392e058a6fSRabin Vincent static int mvsd_resume(struct platform_device *dev) 840236caa7cSMaen Suleiman { 8412e058a6fSRabin Vincent struct mmc_host *mmc = platform_get_drvdata(dev); 842236caa7cSMaen Suleiman int ret = 0; 843236caa7cSMaen Suleiman 8442e058a6fSRabin Vincent if (mmc) 845236caa7cSMaen Suleiman ret = mmc_resume_host(mmc); 846236caa7cSMaen Suleiman 847236caa7cSMaen Suleiman return ret; 848236caa7cSMaen Suleiman } 849236caa7cSMaen Suleiman #else 850236caa7cSMaen Suleiman #define mvsd_suspend NULL 851236caa7cSMaen Suleiman #define mvsd_resume NULL 852236caa7cSMaen Suleiman #endif 853236caa7cSMaen Suleiman 854236caa7cSMaen Suleiman static struct platform_driver mvsd_driver = { 855236caa7cSMaen Suleiman .remove = __exit_p(mvsd_remove), 856236caa7cSMaen Suleiman .suspend = mvsd_suspend, 857236caa7cSMaen Suleiman .resume = mvsd_resume, 858236caa7cSMaen Suleiman .driver = { 859236caa7cSMaen Suleiman .name = DRIVER_NAME, 860236caa7cSMaen Suleiman }, 861236caa7cSMaen Suleiman }; 862236caa7cSMaen Suleiman 863236caa7cSMaen Suleiman static int __init mvsd_init(void) 864236caa7cSMaen Suleiman { 865236caa7cSMaen Suleiman return platform_driver_probe(&mvsd_driver, mvsd_probe); 866236caa7cSMaen Suleiman } 867236caa7cSMaen Suleiman 868236caa7cSMaen Suleiman static void __exit mvsd_exit(void) 869236caa7cSMaen Suleiman { 870236caa7cSMaen Suleiman platform_driver_unregister(&mvsd_driver); 871236caa7cSMaen Suleiman } 872236caa7cSMaen Suleiman 873236caa7cSMaen Suleiman module_init(mvsd_init); 874236caa7cSMaen Suleiman module_exit(mvsd_exit); 875236caa7cSMaen Suleiman 876236caa7cSMaen Suleiman /* maximum card clock frequency (default 50MHz) */ 877236caa7cSMaen Suleiman module_param(maxfreq, int, 0); 878236caa7cSMaen Suleiman 879236caa7cSMaen Suleiman /* force PIO transfers all the time */ 880236caa7cSMaen Suleiman module_param(nodma, int, 0); 881236caa7cSMaen Suleiman 882236caa7cSMaen Suleiman MODULE_AUTHOR("Maen Suleiman, Nicolas Pitre"); 883236caa7cSMaen Suleiman MODULE_DESCRIPTION("Marvell MMC,SD,SDIO Host Controller driver"); 884236caa7cSMaen Suleiman MODULE_LICENSE("GPL"); 885703aacedSNicolas Pitre MODULE_ALIAS("platform:mvsdio"); 886