17d2be074SHaavard Skinnemoen /* 27d2be074SHaavard Skinnemoen * Atmel MultiMedia Card Interface driver 37d2be074SHaavard Skinnemoen * 47d2be074SHaavard Skinnemoen * Copyright (C) 2004-2008 Atmel Corporation 57d2be074SHaavard Skinnemoen * 67d2be074SHaavard Skinnemoen * This program is free software; you can redistribute it and/or modify 77d2be074SHaavard Skinnemoen * it under the terms of the GNU General Public License version 2 as 87d2be074SHaavard Skinnemoen * published by the Free Software Foundation. 97d2be074SHaavard Skinnemoen */ 107d2be074SHaavard Skinnemoen #include <linux/blkdev.h> 117d2be074SHaavard Skinnemoen #include <linux/clk.h> 12deec9ae3SHaavard Skinnemoen #include <linux/debugfs.h> 137d2be074SHaavard Skinnemoen #include <linux/device.h> 14fbfca4b8SBen Nizette #include <linux/err.h> 153c26e170SDavid Brownell #include <linux/gpio.h> 167d2be074SHaavard Skinnemoen #include <linux/init.h> 177d2be074SHaavard Skinnemoen #include <linux/interrupt.h> 187d2be074SHaavard Skinnemoen #include <linux/ioport.h> 197d2be074SHaavard Skinnemoen #include <linux/module.h> 207d2be074SHaavard Skinnemoen #include <linux/platform_device.h> 217d2be074SHaavard Skinnemoen #include <linux/scatterlist.h> 22deec9ae3SHaavard Skinnemoen #include <linux/seq_file.h> 23deec9ae3SHaavard Skinnemoen #include <linux/stat.h> 247d2be074SHaavard Skinnemoen 257d2be074SHaavard Skinnemoen #include <linux/mmc/host.h> 267d2be074SHaavard Skinnemoen 277d2be074SHaavard Skinnemoen #include <asm/atmel-mci.h> 287d2be074SHaavard Skinnemoen #include <asm/io.h> 297d2be074SHaavard Skinnemoen #include <asm/unaligned.h> 307d2be074SHaavard Skinnemoen 313663b736SHaavard Skinnemoen #include <mach/board.h> 327d2be074SHaavard Skinnemoen 337d2be074SHaavard Skinnemoen #include "atmel-mci-regs.h" 347d2be074SHaavard Skinnemoen 357d2be074SHaavard Skinnemoen #define ATMCI_DATA_ERROR_FLAGS (MCI_DCRCE | MCI_DTOE | MCI_OVRE | MCI_UNRE) 367d2be074SHaavard Skinnemoen 377d2be074SHaavard Skinnemoen enum { 387d2be074SHaavard Skinnemoen EVENT_CMD_COMPLETE = 0, 397d2be074SHaavard Skinnemoen EVENT_DATA_ERROR, 407d2be074SHaavard Skinnemoen EVENT_DATA_COMPLETE, 417d2be074SHaavard Skinnemoen EVENT_STOP_SENT, 427d2be074SHaavard Skinnemoen EVENT_STOP_COMPLETE, 437d2be074SHaavard Skinnemoen EVENT_XFER_COMPLETE, 447d2be074SHaavard Skinnemoen }; 457d2be074SHaavard Skinnemoen 467d2be074SHaavard Skinnemoen struct atmel_mci { 477d2be074SHaavard Skinnemoen struct mmc_host *mmc; 487d2be074SHaavard Skinnemoen void __iomem *regs; 497d2be074SHaavard Skinnemoen 507d2be074SHaavard Skinnemoen struct scatterlist *sg; 517d2be074SHaavard Skinnemoen unsigned int pio_offset; 527d2be074SHaavard Skinnemoen 537d2be074SHaavard Skinnemoen struct mmc_request *mrq; 547d2be074SHaavard Skinnemoen struct mmc_command *cmd; 557d2be074SHaavard Skinnemoen struct mmc_data *data; 567d2be074SHaavard Skinnemoen 577d2be074SHaavard Skinnemoen u32 cmd_status; 587d2be074SHaavard Skinnemoen u32 data_status; 597d2be074SHaavard Skinnemoen u32 stop_status; 607d2be074SHaavard Skinnemoen u32 stop_cmdr; 617d2be074SHaavard Skinnemoen 627d2be074SHaavard Skinnemoen u32 mode_reg; 637d2be074SHaavard Skinnemoen u32 sdc_reg; 647d2be074SHaavard Skinnemoen 657d2be074SHaavard Skinnemoen struct tasklet_struct tasklet; 667d2be074SHaavard Skinnemoen unsigned long pending_events; 677d2be074SHaavard Skinnemoen unsigned long completed_events; 687d2be074SHaavard Skinnemoen 697d2be074SHaavard Skinnemoen int present; 707d2be074SHaavard Skinnemoen int detect_pin; 717d2be074SHaavard Skinnemoen int wp_pin; 727d2be074SHaavard Skinnemoen 737d2be074SHaavard Skinnemoen /* For detect pin debouncing */ 747d2be074SHaavard Skinnemoen struct timer_list detect_timer; 757d2be074SHaavard Skinnemoen 767d2be074SHaavard Skinnemoen unsigned long bus_hz; 777d2be074SHaavard Skinnemoen unsigned long mapbase; 787d2be074SHaavard Skinnemoen struct clk *mck; 797d2be074SHaavard Skinnemoen struct platform_device *pdev; 807d2be074SHaavard Skinnemoen }; 817d2be074SHaavard Skinnemoen 827d2be074SHaavard Skinnemoen #define atmci_is_completed(host, event) \ 837d2be074SHaavard Skinnemoen test_bit(event, &host->completed_events) 847d2be074SHaavard Skinnemoen #define atmci_test_and_clear_pending(host, event) \ 857d2be074SHaavard Skinnemoen test_and_clear_bit(event, &host->pending_events) 867d2be074SHaavard Skinnemoen #define atmci_test_and_set_completed(host, event) \ 877d2be074SHaavard Skinnemoen test_and_set_bit(event, &host->completed_events) 887d2be074SHaavard Skinnemoen #define atmci_set_completed(host, event) \ 897d2be074SHaavard Skinnemoen set_bit(event, &host->completed_events) 907d2be074SHaavard Skinnemoen #define atmci_set_pending(host, event) \ 917d2be074SHaavard Skinnemoen set_bit(event, &host->pending_events) 927d2be074SHaavard Skinnemoen #define atmci_clear_pending(host, event) \ 937d2be074SHaavard Skinnemoen clear_bit(event, &host->pending_events) 947d2be074SHaavard Skinnemoen 95deec9ae3SHaavard Skinnemoen /* 96deec9ae3SHaavard Skinnemoen * The debugfs stuff below is mostly optimized away when 97deec9ae3SHaavard Skinnemoen * CONFIG_DEBUG_FS is not set. 98deec9ae3SHaavard Skinnemoen */ 99deec9ae3SHaavard Skinnemoen static int atmci_req_show(struct seq_file *s, void *v) 100deec9ae3SHaavard Skinnemoen { 101deec9ae3SHaavard Skinnemoen struct atmel_mci *host = s->private; 102deec9ae3SHaavard Skinnemoen struct mmc_request *mrq = host->mrq; 103deec9ae3SHaavard Skinnemoen struct mmc_command *cmd; 104deec9ae3SHaavard Skinnemoen struct mmc_command *stop; 105deec9ae3SHaavard Skinnemoen struct mmc_data *data; 106deec9ae3SHaavard Skinnemoen 107deec9ae3SHaavard Skinnemoen /* Make sure we get a consistent snapshot */ 108deec9ae3SHaavard Skinnemoen spin_lock_irq(&host->mmc->lock); 109deec9ae3SHaavard Skinnemoen 110deec9ae3SHaavard Skinnemoen if (mrq) { 111deec9ae3SHaavard Skinnemoen cmd = mrq->cmd; 112deec9ae3SHaavard Skinnemoen data = mrq->data; 113deec9ae3SHaavard Skinnemoen stop = mrq->stop; 114deec9ae3SHaavard Skinnemoen 115deec9ae3SHaavard Skinnemoen if (cmd) 116deec9ae3SHaavard Skinnemoen seq_printf(s, 117deec9ae3SHaavard Skinnemoen "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", 118deec9ae3SHaavard Skinnemoen cmd->opcode, cmd->arg, cmd->flags, 119deec9ae3SHaavard Skinnemoen cmd->resp[0], cmd->resp[1], cmd->resp[2], 120deec9ae3SHaavard Skinnemoen cmd->resp[2], cmd->error); 121deec9ae3SHaavard Skinnemoen if (data) 122deec9ae3SHaavard Skinnemoen seq_printf(s, "DATA %u / %u * %u flg %x err %d\n", 123deec9ae3SHaavard Skinnemoen data->bytes_xfered, data->blocks, 124deec9ae3SHaavard Skinnemoen data->blksz, data->flags, data->error); 125deec9ae3SHaavard Skinnemoen if (stop) 126deec9ae3SHaavard Skinnemoen seq_printf(s, 127deec9ae3SHaavard Skinnemoen "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", 128deec9ae3SHaavard Skinnemoen stop->opcode, stop->arg, stop->flags, 129deec9ae3SHaavard Skinnemoen stop->resp[0], stop->resp[1], stop->resp[2], 130deec9ae3SHaavard Skinnemoen stop->resp[2], stop->error); 131deec9ae3SHaavard Skinnemoen } 132deec9ae3SHaavard Skinnemoen 133deec9ae3SHaavard Skinnemoen spin_unlock_irq(&host->mmc->lock); 134deec9ae3SHaavard Skinnemoen 135deec9ae3SHaavard Skinnemoen return 0; 136deec9ae3SHaavard Skinnemoen } 137deec9ae3SHaavard Skinnemoen 138deec9ae3SHaavard Skinnemoen static int atmci_req_open(struct inode *inode, struct file *file) 139deec9ae3SHaavard Skinnemoen { 140deec9ae3SHaavard Skinnemoen return single_open(file, atmci_req_show, inode->i_private); 141deec9ae3SHaavard Skinnemoen } 142deec9ae3SHaavard Skinnemoen 143deec9ae3SHaavard Skinnemoen static const struct file_operations atmci_req_fops = { 144deec9ae3SHaavard Skinnemoen .owner = THIS_MODULE, 145deec9ae3SHaavard Skinnemoen .open = atmci_req_open, 146deec9ae3SHaavard Skinnemoen .read = seq_read, 147deec9ae3SHaavard Skinnemoen .llseek = seq_lseek, 148deec9ae3SHaavard Skinnemoen .release = single_release, 149deec9ae3SHaavard Skinnemoen }; 150deec9ae3SHaavard Skinnemoen 151deec9ae3SHaavard Skinnemoen static void atmci_show_status_reg(struct seq_file *s, 152deec9ae3SHaavard Skinnemoen const char *regname, u32 value) 153deec9ae3SHaavard Skinnemoen { 154deec9ae3SHaavard Skinnemoen static const char *sr_bit[] = { 155deec9ae3SHaavard Skinnemoen [0] = "CMDRDY", 156deec9ae3SHaavard Skinnemoen [1] = "RXRDY", 157deec9ae3SHaavard Skinnemoen [2] = "TXRDY", 158deec9ae3SHaavard Skinnemoen [3] = "BLKE", 159deec9ae3SHaavard Skinnemoen [4] = "DTIP", 160deec9ae3SHaavard Skinnemoen [5] = "NOTBUSY", 161deec9ae3SHaavard Skinnemoen [8] = "SDIOIRQA", 162deec9ae3SHaavard Skinnemoen [9] = "SDIOIRQB", 163deec9ae3SHaavard Skinnemoen [16] = "RINDE", 164deec9ae3SHaavard Skinnemoen [17] = "RDIRE", 165deec9ae3SHaavard Skinnemoen [18] = "RCRCE", 166deec9ae3SHaavard Skinnemoen [19] = "RENDE", 167deec9ae3SHaavard Skinnemoen [20] = "RTOE", 168deec9ae3SHaavard Skinnemoen [21] = "DCRCE", 169deec9ae3SHaavard Skinnemoen [22] = "DTOE", 170deec9ae3SHaavard Skinnemoen [30] = "OVRE", 171deec9ae3SHaavard Skinnemoen [31] = "UNRE", 172deec9ae3SHaavard Skinnemoen }; 173deec9ae3SHaavard Skinnemoen unsigned int i; 174deec9ae3SHaavard Skinnemoen 175deec9ae3SHaavard Skinnemoen seq_printf(s, "%s:\t0x%08x", regname, value); 176deec9ae3SHaavard Skinnemoen for (i = 0; i < ARRAY_SIZE(sr_bit); i++) { 177deec9ae3SHaavard Skinnemoen if (value & (1 << i)) { 178deec9ae3SHaavard Skinnemoen if (sr_bit[i]) 179deec9ae3SHaavard Skinnemoen seq_printf(s, " %s", sr_bit[i]); 180deec9ae3SHaavard Skinnemoen else 181deec9ae3SHaavard Skinnemoen seq_puts(s, " UNKNOWN"); 182deec9ae3SHaavard Skinnemoen } 183deec9ae3SHaavard Skinnemoen } 184deec9ae3SHaavard Skinnemoen seq_putc(s, '\n'); 185deec9ae3SHaavard Skinnemoen } 186deec9ae3SHaavard Skinnemoen 187deec9ae3SHaavard Skinnemoen static int atmci_regs_show(struct seq_file *s, void *v) 188deec9ae3SHaavard Skinnemoen { 189deec9ae3SHaavard Skinnemoen struct atmel_mci *host = s->private; 190deec9ae3SHaavard Skinnemoen u32 *buf; 191deec9ae3SHaavard Skinnemoen 192deec9ae3SHaavard Skinnemoen buf = kmalloc(MCI_REGS_SIZE, GFP_KERNEL); 193deec9ae3SHaavard Skinnemoen if (!buf) 194deec9ae3SHaavard Skinnemoen return -ENOMEM; 195deec9ae3SHaavard Skinnemoen 196deec9ae3SHaavard Skinnemoen /* Grab a more or less consistent snapshot */ 197deec9ae3SHaavard Skinnemoen spin_lock_irq(&host->mmc->lock); 19887e60f2bSHaavard Skinnemoen clk_enable(host->mck); 199deec9ae3SHaavard Skinnemoen memcpy_fromio(buf, host->regs, MCI_REGS_SIZE); 20087e60f2bSHaavard Skinnemoen clk_disable(host->mck); 201deec9ae3SHaavard Skinnemoen spin_unlock_irq(&host->mmc->lock); 202deec9ae3SHaavard Skinnemoen 203deec9ae3SHaavard Skinnemoen seq_printf(s, "MR:\t0x%08x%s%s CLKDIV=%u\n", 204deec9ae3SHaavard Skinnemoen buf[MCI_MR / 4], 205deec9ae3SHaavard Skinnemoen buf[MCI_MR / 4] & MCI_MR_RDPROOF ? " RDPROOF" : "", 206deec9ae3SHaavard Skinnemoen buf[MCI_MR / 4] & MCI_MR_WRPROOF ? " WRPROOF" : "", 207deec9ae3SHaavard Skinnemoen buf[MCI_MR / 4] & 0xff); 208deec9ae3SHaavard Skinnemoen seq_printf(s, "DTOR:\t0x%08x\n", buf[MCI_DTOR / 4]); 209deec9ae3SHaavard Skinnemoen seq_printf(s, "SDCR:\t0x%08x\n", buf[MCI_SDCR / 4]); 210deec9ae3SHaavard Skinnemoen seq_printf(s, "ARGR:\t0x%08x\n", buf[MCI_ARGR / 4]); 211deec9ae3SHaavard Skinnemoen seq_printf(s, "BLKR:\t0x%08x BCNT=%u BLKLEN=%u\n", 212deec9ae3SHaavard Skinnemoen buf[MCI_BLKR / 4], 213deec9ae3SHaavard Skinnemoen buf[MCI_BLKR / 4] & 0xffff, 214deec9ae3SHaavard Skinnemoen (buf[MCI_BLKR / 4] >> 16) & 0xffff); 215deec9ae3SHaavard Skinnemoen 216deec9ae3SHaavard Skinnemoen /* Don't read RSPR and RDR; it will consume the data there */ 217deec9ae3SHaavard Skinnemoen 218deec9ae3SHaavard Skinnemoen atmci_show_status_reg(s, "SR", buf[MCI_SR / 4]); 219deec9ae3SHaavard Skinnemoen atmci_show_status_reg(s, "IMR", buf[MCI_IMR / 4]); 220deec9ae3SHaavard Skinnemoen 221b17339a1SHaavard Skinnemoen kfree(buf); 222b17339a1SHaavard Skinnemoen 223deec9ae3SHaavard Skinnemoen return 0; 224deec9ae3SHaavard Skinnemoen } 225deec9ae3SHaavard Skinnemoen 226deec9ae3SHaavard Skinnemoen static int atmci_regs_open(struct inode *inode, struct file *file) 227deec9ae3SHaavard Skinnemoen { 228deec9ae3SHaavard Skinnemoen return single_open(file, atmci_regs_show, inode->i_private); 229deec9ae3SHaavard Skinnemoen } 230deec9ae3SHaavard Skinnemoen 231deec9ae3SHaavard Skinnemoen static const struct file_operations atmci_regs_fops = { 232deec9ae3SHaavard Skinnemoen .owner = THIS_MODULE, 233deec9ae3SHaavard Skinnemoen .open = atmci_regs_open, 234deec9ae3SHaavard Skinnemoen .read = seq_read, 235deec9ae3SHaavard Skinnemoen .llseek = seq_lseek, 236deec9ae3SHaavard Skinnemoen .release = single_release, 237deec9ae3SHaavard Skinnemoen }; 238deec9ae3SHaavard Skinnemoen 239deec9ae3SHaavard Skinnemoen static void atmci_init_debugfs(struct atmel_mci *host) 240deec9ae3SHaavard Skinnemoen { 241deec9ae3SHaavard Skinnemoen struct mmc_host *mmc; 242deec9ae3SHaavard Skinnemoen struct dentry *root; 243deec9ae3SHaavard Skinnemoen struct dentry *node; 244deec9ae3SHaavard Skinnemoen 245deec9ae3SHaavard Skinnemoen mmc = host->mmc; 246deec9ae3SHaavard Skinnemoen root = mmc->debugfs_root; 247deec9ae3SHaavard Skinnemoen if (!root) 248deec9ae3SHaavard Skinnemoen return; 249deec9ae3SHaavard Skinnemoen 250deec9ae3SHaavard Skinnemoen node = debugfs_create_file("regs", S_IRUSR, root, host, 251deec9ae3SHaavard Skinnemoen &atmci_regs_fops); 252deec9ae3SHaavard Skinnemoen if (IS_ERR(node)) 253deec9ae3SHaavard Skinnemoen return; 254deec9ae3SHaavard Skinnemoen if (!node) 255deec9ae3SHaavard Skinnemoen goto err; 256deec9ae3SHaavard Skinnemoen 257deec9ae3SHaavard Skinnemoen node = debugfs_create_file("req", S_IRUSR, root, host, &atmci_req_fops); 258deec9ae3SHaavard Skinnemoen if (!node) 259deec9ae3SHaavard Skinnemoen goto err; 260deec9ae3SHaavard Skinnemoen 261deec9ae3SHaavard Skinnemoen node = debugfs_create_x32("pending_events", S_IRUSR, root, 262deec9ae3SHaavard Skinnemoen (u32 *)&host->pending_events); 263deec9ae3SHaavard Skinnemoen if (!node) 264deec9ae3SHaavard Skinnemoen goto err; 265deec9ae3SHaavard Skinnemoen 266deec9ae3SHaavard Skinnemoen node = debugfs_create_x32("completed_events", S_IRUSR, root, 267deec9ae3SHaavard Skinnemoen (u32 *)&host->completed_events); 268deec9ae3SHaavard Skinnemoen if (!node) 269deec9ae3SHaavard Skinnemoen goto err; 270deec9ae3SHaavard Skinnemoen 271deec9ae3SHaavard Skinnemoen return; 272deec9ae3SHaavard Skinnemoen 273deec9ae3SHaavard Skinnemoen err: 274deec9ae3SHaavard Skinnemoen dev_err(&host->pdev->dev, 275deec9ae3SHaavard Skinnemoen "failed to initialize debugfs for controller\n"); 276deec9ae3SHaavard Skinnemoen } 2777d2be074SHaavard Skinnemoen 2787d2be074SHaavard Skinnemoen static void atmci_enable(struct atmel_mci *host) 2797d2be074SHaavard Skinnemoen { 2807d2be074SHaavard Skinnemoen clk_enable(host->mck); 2817d2be074SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_MCIEN); 2827d2be074SHaavard Skinnemoen mci_writel(host, MR, host->mode_reg); 2837d2be074SHaavard Skinnemoen mci_writel(host, SDCR, host->sdc_reg); 2847d2be074SHaavard Skinnemoen } 2857d2be074SHaavard Skinnemoen 2867d2be074SHaavard Skinnemoen static void atmci_disable(struct atmel_mci *host) 2877d2be074SHaavard Skinnemoen { 2887d2be074SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_SWRST); 2897d2be074SHaavard Skinnemoen 2907d2be074SHaavard Skinnemoen /* Stall until write is complete, then disable the bus clock */ 2917d2be074SHaavard Skinnemoen mci_readl(host, SR); 2927d2be074SHaavard Skinnemoen clk_disable(host->mck); 2937d2be074SHaavard Skinnemoen } 2947d2be074SHaavard Skinnemoen 2957d2be074SHaavard Skinnemoen static inline unsigned int ns_to_clocks(struct atmel_mci *host, 2967d2be074SHaavard Skinnemoen unsigned int ns) 2977d2be074SHaavard Skinnemoen { 2987d2be074SHaavard Skinnemoen return (ns * (host->bus_hz / 1000000) + 999) / 1000; 2997d2be074SHaavard Skinnemoen } 3007d2be074SHaavard Skinnemoen 3017d2be074SHaavard Skinnemoen static void atmci_set_timeout(struct atmel_mci *host, 3027d2be074SHaavard Skinnemoen struct mmc_data *data) 3037d2be074SHaavard Skinnemoen { 3047d2be074SHaavard Skinnemoen static unsigned dtomul_to_shift[] = { 3057d2be074SHaavard Skinnemoen 0, 4, 7, 8, 10, 12, 16, 20 3067d2be074SHaavard Skinnemoen }; 3077d2be074SHaavard Skinnemoen unsigned timeout; 3087d2be074SHaavard Skinnemoen unsigned dtocyc; 3097d2be074SHaavard Skinnemoen unsigned dtomul; 3107d2be074SHaavard Skinnemoen 3117d2be074SHaavard Skinnemoen timeout = ns_to_clocks(host, data->timeout_ns) + data->timeout_clks; 3127d2be074SHaavard Skinnemoen 3137d2be074SHaavard Skinnemoen for (dtomul = 0; dtomul < 8; dtomul++) { 3147d2be074SHaavard Skinnemoen unsigned shift = dtomul_to_shift[dtomul]; 3157d2be074SHaavard Skinnemoen dtocyc = (timeout + (1 << shift) - 1) >> shift; 3167d2be074SHaavard Skinnemoen if (dtocyc < 15) 3177d2be074SHaavard Skinnemoen break; 3187d2be074SHaavard Skinnemoen } 3197d2be074SHaavard Skinnemoen 3207d2be074SHaavard Skinnemoen if (dtomul >= 8) { 3217d2be074SHaavard Skinnemoen dtomul = 7; 3227d2be074SHaavard Skinnemoen dtocyc = 15; 3237d2be074SHaavard Skinnemoen } 3247d2be074SHaavard Skinnemoen 3257d2be074SHaavard Skinnemoen dev_vdbg(&host->mmc->class_dev, "setting timeout to %u cycles\n", 3267d2be074SHaavard Skinnemoen dtocyc << dtomul_to_shift[dtomul]); 3277d2be074SHaavard Skinnemoen mci_writel(host, DTOR, (MCI_DTOMUL(dtomul) | MCI_DTOCYC(dtocyc))); 3287d2be074SHaavard Skinnemoen } 3297d2be074SHaavard Skinnemoen 3307d2be074SHaavard Skinnemoen /* 3317d2be074SHaavard Skinnemoen * Return mask with command flags to be enabled for this command. 3327d2be074SHaavard Skinnemoen */ 3337d2be074SHaavard Skinnemoen static u32 atmci_prepare_command(struct mmc_host *mmc, 3347d2be074SHaavard Skinnemoen struct mmc_command *cmd) 3357d2be074SHaavard Skinnemoen { 3367d2be074SHaavard Skinnemoen struct mmc_data *data; 3377d2be074SHaavard Skinnemoen u32 cmdr; 3387d2be074SHaavard Skinnemoen 3397d2be074SHaavard Skinnemoen cmd->error = -EINPROGRESS; 3407d2be074SHaavard Skinnemoen 3417d2be074SHaavard Skinnemoen cmdr = MCI_CMDR_CMDNB(cmd->opcode); 3427d2be074SHaavard Skinnemoen 3437d2be074SHaavard Skinnemoen if (cmd->flags & MMC_RSP_PRESENT) { 3447d2be074SHaavard Skinnemoen if (cmd->flags & MMC_RSP_136) 3457d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_RSPTYP_136BIT; 3467d2be074SHaavard Skinnemoen else 3477d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_RSPTYP_48BIT; 3487d2be074SHaavard Skinnemoen } 3497d2be074SHaavard Skinnemoen 3507d2be074SHaavard Skinnemoen /* 3517d2be074SHaavard Skinnemoen * This should really be MAXLAT_5 for CMD2 and ACMD41, but 3527d2be074SHaavard Skinnemoen * it's too difficult to determine whether this is an ACMD or 3537d2be074SHaavard Skinnemoen * not. Better make it 64. 3547d2be074SHaavard Skinnemoen */ 3557d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_MAXLAT_64CYC; 3567d2be074SHaavard Skinnemoen 3577d2be074SHaavard Skinnemoen if (mmc->ios.bus_mode == MMC_BUSMODE_OPENDRAIN) 3587d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_OPDCMD; 3597d2be074SHaavard Skinnemoen 3607d2be074SHaavard Skinnemoen data = cmd->data; 3617d2be074SHaavard Skinnemoen if (data) { 3627d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_START_XFER; 3637d2be074SHaavard Skinnemoen if (data->flags & MMC_DATA_STREAM) 3647d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_STREAM; 3657d2be074SHaavard Skinnemoen else if (data->blocks > 1) 3667d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_MULTI_BLOCK; 3677d2be074SHaavard Skinnemoen else 3687d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_BLOCK; 3697d2be074SHaavard Skinnemoen 3707d2be074SHaavard Skinnemoen if (data->flags & MMC_DATA_READ) 3717d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_TRDIR_READ; 3727d2be074SHaavard Skinnemoen } 3737d2be074SHaavard Skinnemoen 3747d2be074SHaavard Skinnemoen return cmdr; 3757d2be074SHaavard Skinnemoen } 3767d2be074SHaavard Skinnemoen 3777d2be074SHaavard Skinnemoen static void atmci_start_command(struct atmel_mci *host, 3787d2be074SHaavard Skinnemoen struct mmc_command *cmd, 3797d2be074SHaavard Skinnemoen u32 cmd_flags) 3807d2be074SHaavard Skinnemoen { 3817d2be074SHaavard Skinnemoen /* Must read host->cmd after testing event flags */ 3827d2be074SHaavard Skinnemoen smp_rmb(); 3837d2be074SHaavard Skinnemoen WARN_ON(host->cmd); 3847d2be074SHaavard Skinnemoen host->cmd = cmd; 3857d2be074SHaavard Skinnemoen 3867d2be074SHaavard Skinnemoen dev_vdbg(&host->mmc->class_dev, 3877d2be074SHaavard Skinnemoen "start command: ARGR=0x%08x CMDR=0x%08x\n", 3887d2be074SHaavard Skinnemoen cmd->arg, cmd_flags); 3897d2be074SHaavard Skinnemoen 3907d2be074SHaavard Skinnemoen mci_writel(host, ARGR, cmd->arg); 3917d2be074SHaavard Skinnemoen mci_writel(host, CMDR, cmd_flags); 3927d2be074SHaavard Skinnemoen } 3937d2be074SHaavard Skinnemoen 3947d2be074SHaavard Skinnemoen static void send_stop_cmd(struct mmc_host *mmc, struct mmc_data *data) 3957d2be074SHaavard Skinnemoen { 3967d2be074SHaavard Skinnemoen struct atmel_mci *host = mmc_priv(mmc); 3977d2be074SHaavard Skinnemoen 3987d2be074SHaavard Skinnemoen atmci_start_command(host, data->stop, host->stop_cmdr); 3997d2be074SHaavard Skinnemoen mci_writel(host, IER, MCI_CMDRDY); 4007d2be074SHaavard Skinnemoen } 4017d2be074SHaavard Skinnemoen 4027d2be074SHaavard Skinnemoen static void atmci_request_end(struct mmc_host *mmc, struct mmc_request *mrq) 4037d2be074SHaavard Skinnemoen { 4047d2be074SHaavard Skinnemoen struct atmel_mci *host = mmc_priv(mmc); 4057d2be074SHaavard Skinnemoen 4067d2be074SHaavard Skinnemoen WARN_ON(host->cmd || host->data); 4077d2be074SHaavard Skinnemoen host->mrq = NULL; 4087d2be074SHaavard Skinnemoen 4097d2be074SHaavard Skinnemoen atmci_disable(host); 4107d2be074SHaavard Skinnemoen 4117d2be074SHaavard Skinnemoen mmc_request_done(mmc, mrq); 4127d2be074SHaavard Skinnemoen } 4137d2be074SHaavard Skinnemoen 4147d2be074SHaavard Skinnemoen /* 4157d2be074SHaavard Skinnemoen * Returns a mask of interrupt flags to be enabled after the whole 4167d2be074SHaavard Skinnemoen * request has been prepared. 4177d2be074SHaavard Skinnemoen */ 4187d2be074SHaavard Skinnemoen static u32 atmci_submit_data(struct mmc_host *mmc, struct mmc_data *data) 4197d2be074SHaavard Skinnemoen { 4207d2be074SHaavard Skinnemoen struct atmel_mci *host = mmc_priv(mmc); 4217d2be074SHaavard Skinnemoen u32 iflags; 4227d2be074SHaavard Skinnemoen 4237d2be074SHaavard Skinnemoen data->error = -EINPROGRESS; 4247d2be074SHaavard Skinnemoen 4257d2be074SHaavard Skinnemoen WARN_ON(host->data); 4267d2be074SHaavard Skinnemoen host->sg = NULL; 4277d2be074SHaavard Skinnemoen host->data = data; 4287d2be074SHaavard Skinnemoen 4297d2be074SHaavard Skinnemoen dev_vdbg(&mmc->class_dev, "BLKR=0x%08x\n", 4307d2be074SHaavard Skinnemoen MCI_BCNT(data->blocks) | MCI_BLKLEN(data->blksz)); 4317d2be074SHaavard Skinnemoen 4327d2be074SHaavard Skinnemoen iflags = ATMCI_DATA_ERROR_FLAGS; 4337d2be074SHaavard Skinnemoen host->sg = data->sg; 4347d2be074SHaavard Skinnemoen host->pio_offset = 0; 4357d2be074SHaavard Skinnemoen if (data->flags & MMC_DATA_READ) 4367d2be074SHaavard Skinnemoen iflags |= MCI_RXRDY; 4377d2be074SHaavard Skinnemoen else 4387d2be074SHaavard Skinnemoen iflags |= MCI_TXRDY; 4397d2be074SHaavard Skinnemoen 4407d2be074SHaavard Skinnemoen return iflags; 4417d2be074SHaavard Skinnemoen } 4427d2be074SHaavard Skinnemoen 4437d2be074SHaavard Skinnemoen static void atmci_request(struct mmc_host *mmc, struct mmc_request *mrq) 4447d2be074SHaavard Skinnemoen { 4457d2be074SHaavard Skinnemoen struct atmel_mci *host = mmc_priv(mmc); 4467d2be074SHaavard Skinnemoen struct mmc_data *data; 4477d2be074SHaavard Skinnemoen struct mmc_command *cmd; 4487d2be074SHaavard Skinnemoen u32 iflags; 4497d2be074SHaavard Skinnemoen u32 cmdflags = 0; 4507d2be074SHaavard Skinnemoen 4517d2be074SHaavard Skinnemoen iflags = mci_readl(host, IMR); 4527d2be074SHaavard Skinnemoen if (iflags) 4537d2be074SHaavard Skinnemoen dev_warn(&mmc->class_dev, "WARNING: IMR=0x%08x\n", 4547d2be074SHaavard Skinnemoen mci_readl(host, IMR)); 4557d2be074SHaavard Skinnemoen 4567d2be074SHaavard Skinnemoen WARN_ON(host->mrq != NULL); 4577d2be074SHaavard Skinnemoen 4587d2be074SHaavard Skinnemoen /* 4597d2be074SHaavard Skinnemoen * We may "know" the card is gone even though there's still an 4607d2be074SHaavard Skinnemoen * electrical connection. If so, we really need to communicate 4617d2be074SHaavard Skinnemoen * this to the MMC core since there won't be any more 4627d2be074SHaavard Skinnemoen * interrupts as the card is completely removed. Otherwise, 4637d2be074SHaavard Skinnemoen * the MMC core might believe the card is still there even 4647d2be074SHaavard Skinnemoen * though the card was just removed very slowly. 4657d2be074SHaavard Skinnemoen */ 4667d2be074SHaavard Skinnemoen if (!host->present) { 4677d2be074SHaavard Skinnemoen mrq->cmd->error = -ENOMEDIUM; 4687d2be074SHaavard Skinnemoen mmc_request_done(mmc, mrq); 4697d2be074SHaavard Skinnemoen return; 4707d2be074SHaavard Skinnemoen } 4717d2be074SHaavard Skinnemoen 4727d2be074SHaavard Skinnemoen host->mrq = mrq; 4737d2be074SHaavard Skinnemoen host->pending_events = 0; 4747d2be074SHaavard Skinnemoen host->completed_events = 0; 4757d2be074SHaavard Skinnemoen 4767d2be074SHaavard Skinnemoen atmci_enable(host); 4777d2be074SHaavard Skinnemoen 4787d2be074SHaavard Skinnemoen /* We don't support multiple blocks of weird lengths. */ 4797d2be074SHaavard Skinnemoen data = mrq->data; 4807d2be074SHaavard Skinnemoen if (data) { 4817d2be074SHaavard Skinnemoen if (data->blocks > 1 && data->blksz & 3) 4827d2be074SHaavard Skinnemoen goto fail; 4837d2be074SHaavard Skinnemoen atmci_set_timeout(host, data); 484a252e3e3SHaavard Skinnemoen 485a252e3e3SHaavard Skinnemoen /* Must set block count/size before sending command */ 486a252e3e3SHaavard Skinnemoen mci_writel(host, BLKR, MCI_BCNT(data->blocks) 487a252e3e3SHaavard Skinnemoen | MCI_BLKLEN(data->blksz)); 4887d2be074SHaavard Skinnemoen } 4897d2be074SHaavard Skinnemoen 4907d2be074SHaavard Skinnemoen iflags = MCI_CMDRDY; 4917d2be074SHaavard Skinnemoen cmd = mrq->cmd; 4927d2be074SHaavard Skinnemoen cmdflags = atmci_prepare_command(mmc, cmd); 4937d2be074SHaavard Skinnemoen atmci_start_command(host, cmd, cmdflags); 4947d2be074SHaavard Skinnemoen 4957d2be074SHaavard Skinnemoen if (data) 4967d2be074SHaavard Skinnemoen iflags |= atmci_submit_data(mmc, data); 4977d2be074SHaavard Skinnemoen 4987d2be074SHaavard Skinnemoen if (mrq->stop) { 4997d2be074SHaavard Skinnemoen host->stop_cmdr = atmci_prepare_command(mmc, mrq->stop); 5007d2be074SHaavard Skinnemoen host->stop_cmdr |= MCI_CMDR_STOP_XFER; 5017d2be074SHaavard Skinnemoen if (!(data->flags & MMC_DATA_WRITE)) 5027d2be074SHaavard Skinnemoen host->stop_cmdr |= MCI_CMDR_TRDIR_READ; 5037d2be074SHaavard Skinnemoen if (data->flags & MMC_DATA_STREAM) 5047d2be074SHaavard Skinnemoen host->stop_cmdr |= MCI_CMDR_STREAM; 5057d2be074SHaavard Skinnemoen else 5067d2be074SHaavard Skinnemoen host->stop_cmdr |= MCI_CMDR_MULTI_BLOCK; 5077d2be074SHaavard Skinnemoen } 5087d2be074SHaavard Skinnemoen 5097d2be074SHaavard Skinnemoen /* 5107d2be074SHaavard Skinnemoen * We could have enabled interrupts earlier, but I suspect 5117d2be074SHaavard Skinnemoen * that would open up a nice can of interesting race 5127d2be074SHaavard Skinnemoen * conditions (e.g. command and data complete, but stop not 5137d2be074SHaavard Skinnemoen * prepared yet.) 5147d2be074SHaavard Skinnemoen */ 5157d2be074SHaavard Skinnemoen mci_writel(host, IER, iflags); 5167d2be074SHaavard Skinnemoen 5177d2be074SHaavard Skinnemoen return; 5187d2be074SHaavard Skinnemoen 5197d2be074SHaavard Skinnemoen fail: 5207d2be074SHaavard Skinnemoen atmci_disable(host); 5217d2be074SHaavard Skinnemoen host->mrq = NULL; 5227d2be074SHaavard Skinnemoen mrq->cmd->error = -EINVAL; 5237d2be074SHaavard Skinnemoen mmc_request_done(mmc, mrq); 5247d2be074SHaavard Skinnemoen } 5257d2be074SHaavard Skinnemoen 5267d2be074SHaavard Skinnemoen static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 5277d2be074SHaavard Skinnemoen { 5287d2be074SHaavard Skinnemoen struct atmel_mci *host = mmc_priv(mmc); 5297d2be074SHaavard Skinnemoen 5307d2be074SHaavard Skinnemoen if (ios->clock) { 5317d2be074SHaavard Skinnemoen u32 clkdiv; 5327d2be074SHaavard Skinnemoen 5337d2be074SHaavard Skinnemoen /* Set clock rate */ 5347d2be074SHaavard Skinnemoen clkdiv = DIV_ROUND_UP(host->bus_hz, 2 * ios->clock) - 1; 5357d2be074SHaavard Skinnemoen if (clkdiv > 255) { 5367d2be074SHaavard Skinnemoen dev_warn(&mmc->class_dev, 5377d2be074SHaavard Skinnemoen "clock %u too slow; using %lu\n", 5387d2be074SHaavard Skinnemoen ios->clock, host->bus_hz / (2 * 256)); 5397d2be074SHaavard Skinnemoen clkdiv = 255; 5407d2be074SHaavard Skinnemoen } 5417d2be074SHaavard Skinnemoen 5427d2be074SHaavard Skinnemoen host->mode_reg = MCI_MR_CLKDIV(clkdiv) | MCI_MR_WRPROOF 5437d2be074SHaavard Skinnemoen | MCI_MR_RDPROOF; 5447d2be074SHaavard Skinnemoen } 5457d2be074SHaavard Skinnemoen 5467d2be074SHaavard Skinnemoen switch (ios->bus_width) { 5477d2be074SHaavard Skinnemoen case MMC_BUS_WIDTH_1: 5487d2be074SHaavard Skinnemoen host->sdc_reg = 0; 5497d2be074SHaavard Skinnemoen break; 5507d2be074SHaavard Skinnemoen case MMC_BUS_WIDTH_4: 5517d2be074SHaavard Skinnemoen host->sdc_reg = MCI_SDCBUS_4BIT; 5527d2be074SHaavard Skinnemoen break; 5537d2be074SHaavard Skinnemoen } 5547d2be074SHaavard Skinnemoen 5557d2be074SHaavard Skinnemoen switch (ios->power_mode) { 5567d2be074SHaavard Skinnemoen case MMC_POWER_ON: 5577d2be074SHaavard Skinnemoen /* Send init sequence (74 clock cycles) */ 5587d2be074SHaavard Skinnemoen atmci_enable(host); 5597d2be074SHaavard Skinnemoen mci_writel(host, CMDR, MCI_CMDR_SPCMD_INIT); 5607d2be074SHaavard Skinnemoen while (!(mci_readl(host, SR) & MCI_CMDRDY)) 5617d2be074SHaavard Skinnemoen cpu_relax(); 5627d2be074SHaavard Skinnemoen atmci_disable(host); 5637d2be074SHaavard Skinnemoen break; 5647d2be074SHaavard Skinnemoen default: 5657d2be074SHaavard Skinnemoen /* 5667d2be074SHaavard Skinnemoen * TODO: None of the currently available AVR32-based 5677d2be074SHaavard Skinnemoen * boards allow MMC power to be turned off. Implement 5687d2be074SHaavard Skinnemoen * power control when this can be tested properly. 5697d2be074SHaavard Skinnemoen */ 5707d2be074SHaavard Skinnemoen break; 5717d2be074SHaavard Skinnemoen } 5727d2be074SHaavard Skinnemoen } 5737d2be074SHaavard Skinnemoen 5747d2be074SHaavard Skinnemoen static int atmci_get_ro(struct mmc_host *mmc) 5757d2be074SHaavard Skinnemoen { 5767d2be074SHaavard Skinnemoen int read_only = 0; 5777d2be074SHaavard Skinnemoen struct atmel_mci *host = mmc_priv(mmc); 5787d2be074SHaavard Skinnemoen 5793c26e170SDavid Brownell if (gpio_is_valid(host->wp_pin)) { 5807d2be074SHaavard Skinnemoen read_only = gpio_get_value(host->wp_pin); 5817d2be074SHaavard Skinnemoen dev_dbg(&mmc->class_dev, "card is %s\n", 5827d2be074SHaavard Skinnemoen read_only ? "read-only" : "read-write"); 5837d2be074SHaavard Skinnemoen } else { 5847d2be074SHaavard Skinnemoen dev_dbg(&mmc->class_dev, 5857d2be074SHaavard Skinnemoen "no pin for checking read-only switch." 5867d2be074SHaavard Skinnemoen " Assuming write-enable.\n"); 5877d2be074SHaavard Skinnemoen } 5887d2be074SHaavard Skinnemoen 5897d2be074SHaavard Skinnemoen return read_only; 5907d2be074SHaavard Skinnemoen } 5917d2be074SHaavard Skinnemoen 5927d2be074SHaavard Skinnemoen static struct mmc_host_ops atmci_ops = { 5937d2be074SHaavard Skinnemoen .request = atmci_request, 5947d2be074SHaavard Skinnemoen .set_ios = atmci_set_ios, 5957d2be074SHaavard Skinnemoen .get_ro = atmci_get_ro, 5967d2be074SHaavard Skinnemoen }; 5977d2be074SHaavard Skinnemoen 5987d2be074SHaavard Skinnemoen static void atmci_command_complete(struct atmel_mci *host, 5997d2be074SHaavard Skinnemoen struct mmc_command *cmd, u32 status) 6007d2be074SHaavard Skinnemoen { 6017d2be074SHaavard Skinnemoen /* Read the response from the card (up to 16 bytes) */ 6027d2be074SHaavard Skinnemoen cmd->resp[0] = mci_readl(host, RSPR); 6037d2be074SHaavard Skinnemoen cmd->resp[1] = mci_readl(host, RSPR); 6047d2be074SHaavard Skinnemoen cmd->resp[2] = mci_readl(host, RSPR); 6057d2be074SHaavard Skinnemoen cmd->resp[3] = mci_readl(host, RSPR); 6067d2be074SHaavard Skinnemoen 6077d2be074SHaavard Skinnemoen if (status & MCI_RTOE) 6087d2be074SHaavard Skinnemoen cmd->error = -ETIMEDOUT; 6097d2be074SHaavard Skinnemoen else if ((cmd->flags & MMC_RSP_CRC) && (status & MCI_RCRCE)) 6107d2be074SHaavard Skinnemoen cmd->error = -EILSEQ; 6117d2be074SHaavard Skinnemoen else if (status & (MCI_RINDE | MCI_RDIRE | MCI_RENDE)) 6127d2be074SHaavard Skinnemoen cmd->error = -EIO; 6137d2be074SHaavard Skinnemoen else 6147d2be074SHaavard Skinnemoen cmd->error = 0; 6157d2be074SHaavard Skinnemoen 6167d2be074SHaavard Skinnemoen if (cmd->error) { 6177d2be074SHaavard Skinnemoen dev_dbg(&host->mmc->class_dev, 6187d2be074SHaavard Skinnemoen "command error: status=0x%08x\n", status); 6197d2be074SHaavard Skinnemoen 6207d2be074SHaavard Skinnemoen if (cmd->data) { 6217d2be074SHaavard Skinnemoen host->data = NULL; 6227d2be074SHaavard Skinnemoen mci_writel(host, IDR, MCI_NOTBUSY 6237d2be074SHaavard Skinnemoen | MCI_TXRDY | MCI_RXRDY 6247d2be074SHaavard Skinnemoen | ATMCI_DATA_ERROR_FLAGS); 6257d2be074SHaavard Skinnemoen } 6267d2be074SHaavard Skinnemoen } 6277d2be074SHaavard Skinnemoen } 6287d2be074SHaavard Skinnemoen 6297d2be074SHaavard Skinnemoen static void atmci_detect_change(unsigned long data) 6307d2be074SHaavard Skinnemoen { 6317d2be074SHaavard Skinnemoen struct atmel_mci *host = (struct atmel_mci *)data; 6327d2be074SHaavard Skinnemoen struct mmc_request *mrq = host->mrq; 6337d2be074SHaavard Skinnemoen int present; 6347d2be074SHaavard Skinnemoen 6357d2be074SHaavard Skinnemoen /* 6367d2be074SHaavard Skinnemoen * atmci_remove() sets detect_pin to -1 before freeing the 6377d2be074SHaavard Skinnemoen * interrupt. We must not re-enable the interrupt if it has 6387d2be074SHaavard Skinnemoen * been freed. 6397d2be074SHaavard Skinnemoen */ 6407d2be074SHaavard Skinnemoen smp_rmb(); 6413c26e170SDavid Brownell if (!gpio_is_valid(host->detect_pin)) 6427d2be074SHaavard Skinnemoen return; 6437d2be074SHaavard Skinnemoen 6447d2be074SHaavard Skinnemoen enable_irq(gpio_to_irq(host->detect_pin)); 6457d2be074SHaavard Skinnemoen present = !gpio_get_value(host->detect_pin); 6467d2be074SHaavard Skinnemoen 6477d2be074SHaavard Skinnemoen dev_vdbg(&host->pdev->dev, "detect change: %d (was %d)\n", 6487d2be074SHaavard Skinnemoen present, host->present); 6497d2be074SHaavard Skinnemoen 6507d2be074SHaavard Skinnemoen if (present != host->present) { 6517d2be074SHaavard Skinnemoen dev_dbg(&host->mmc->class_dev, "card %s\n", 6527d2be074SHaavard Skinnemoen present ? "inserted" : "removed"); 6537d2be074SHaavard Skinnemoen host->present = present; 6547d2be074SHaavard Skinnemoen 6557d2be074SHaavard Skinnemoen /* Reset controller if card is gone */ 6567d2be074SHaavard Skinnemoen if (!present) { 6577d2be074SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_SWRST); 6587d2be074SHaavard Skinnemoen mci_writel(host, IDR, ~0UL); 6597d2be074SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_MCIEN); 6607d2be074SHaavard Skinnemoen } 6617d2be074SHaavard Skinnemoen 6627d2be074SHaavard Skinnemoen /* Clean up queue if present */ 6637d2be074SHaavard Skinnemoen if (mrq) { 6647d2be074SHaavard Skinnemoen /* 6657d2be074SHaavard Skinnemoen * Reset controller to terminate any ongoing 6667d2be074SHaavard Skinnemoen * commands or data transfers. 6677d2be074SHaavard Skinnemoen */ 6687d2be074SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_SWRST); 6697d2be074SHaavard Skinnemoen 6707d2be074SHaavard Skinnemoen if (!atmci_is_completed(host, EVENT_CMD_COMPLETE)) 6717d2be074SHaavard Skinnemoen mrq->cmd->error = -ENOMEDIUM; 6727d2be074SHaavard Skinnemoen 6737d2be074SHaavard Skinnemoen if (mrq->data && !atmci_is_completed(host, 6747d2be074SHaavard Skinnemoen EVENT_DATA_COMPLETE)) { 6757d2be074SHaavard Skinnemoen host->data = NULL; 6767d2be074SHaavard Skinnemoen mrq->data->error = -ENOMEDIUM; 6777d2be074SHaavard Skinnemoen } 6787d2be074SHaavard Skinnemoen if (mrq->stop && !atmci_is_completed(host, 6797d2be074SHaavard Skinnemoen EVENT_STOP_COMPLETE)) 6807d2be074SHaavard Skinnemoen mrq->stop->error = -ENOMEDIUM; 6817d2be074SHaavard Skinnemoen 6827d2be074SHaavard Skinnemoen host->cmd = NULL; 6837d2be074SHaavard Skinnemoen atmci_request_end(host->mmc, mrq); 6847d2be074SHaavard Skinnemoen } 6857d2be074SHaavard Skinnemoen 6867d2be074SHaavard Skinnemoen mmc_detect_change(host->mmc, 0); 6877d2be074SHaavard Skinnemoen } 6887d2be074SHaavard Skinnemoen } 6897d2be074SHaavard Skinnemoen 6907d2be074SHaavard Skinnemoen static void atmci_tasklet_func(unsigned long priv) 6917d2be074SHaavard Skinnemoen { 6927d2be074SHaavard Skinnemoen struct mmc_host *mmc = (struct mmc_host *)priv; 6937d2be074SHaavard Skinnemoen struct atmel_mci *host = mmc_priv(mmc); 6947d2be074SHaavard Skinnemoen struct mmc_request *mrq = host->mrq; 6957d2be074SHaavard Skinnemoen struct mmc_data *data = host->data; 6967d2be074SHaavard Skinnemoen 6977d2be074SHaavard Skinnemoen dev_vdbg(&mmc->class_dev, 6987d2be074SHaavard Skinnemoen "tasklet: pending/completed/mask %lx/%lx/%x\n", 6997d2be074SHaavard Skinnemoen host->pending_events, host->completed_events, 7007d2be074SHaavard Skinnemoen mci_readl(host, IMR)); 7017d2be074SHaavard Skinnemoen 7027d2be074SHaavard Skinnemoen if (atmci_test_and_clear_pending(host, EVENT_CMD_COMPLETE)) { 7037d2be074SHaavard Skinnemoen /* 7047d2be074SHaavard Skinnemoen * host->cmd must be set to NULL before the interrupt 7057d2be074SHaavard Skinnemoen * handler sees EVENT_CMD_COMPLETE 7067d2be074SHaavard Skinnemoen */ 7077d2be074SHaavard Skinnemoen host->cmd = NULL; 7087d2be074SHaavard Skinnemoen smp_wmb(); 7097d2be074SHaavard Skinnemoen atmci_set_completed(host, EVENT_CMD_COMPLETE); 7107d2be074SHaavard Skinnemoen atmci_command_complete(host, mrq->cmd, host->cmd_status); 7117d2be074SHaavard Skinnemoen 7127d2be074SHaavard Skinnemoen if (!mrq->cmd->error && mrq->stop 7137d2be074SHaavard Skinnemoen && atmci_is_completed(host, EVENT_XFER_COMPLETE) 7147d2be074SHaavard Skinnemoen && !atmci_test_and_set_completed(host, 7157d2be074SHaavard Skinnemoen EVENT_STOP_SENT)) 7167d2be074SHaavard Skinnemoen send_stop_cmd(host->mmc, mrq->data); 7177d2be074SHaavard Skinnemoen } 7187d2be074SHaavard Skinnemoen if (atmci_test_and_clear_pending(host, EVENT_STOP_COMPLETE)) { 7197d2be074SHaavard Skinnemoen /* 7207d2be074SHaavard Skinnemoen * host->cmd must be set to NULL before the interrupt 7217d2be074SHaavard Skinnemoen * handler sees EVENT_STOP_COMPLETE 7227d2be074SHaavard Skinnemoen */ 7237d2be074SHaavard Skinnemoen host->cmd = NULL; 7247d2be074SHaavard Skinnemoen smp_wmb(); 7257d2be074SHaavard Skinnemoen atmci_set_completed(host, EVENT_STOP_COMPLETE); 7267d2be074SHaavard Skinnemoen atmci_command_complete(host, mrq->stop, host->stop_status); 7277d2be074SHaavard Skinnemoen } 7287d2be074SHaavard Skinnemoen if (atmci_test_and_clear_pending(host, EVENT_DATA_ERROR)) { 7297d2be074SHaavard Skinnemoen u32 status = host->data_status; 7307d2be074SHaavard Skinnemoen 7317d2be074SHaavard Skinnemoen dev_vdbg(&mmc->class_dev, "data error: status=%08x\n", status); 7327d2be074SHaavard Skinnemoen 7337d2be074SHaavard Skinnemoen atmci_set_completed(host, EVENT_DATA_ERROR); 7347d2be074SHaavard Skinnemoen atmci_set_completed(host, EVENT_DATA_COMPLETE); 7357d2be074SHaavard Skinnemoen 7367d2be074SHaavard Skinnemoen if (status & MCI_DTOE) { 7377d2be074SHaavard Skinnemoen dev_dbg(&mmc->class_dev, 7387d2be074SHaavard Skinnemoen "data timeout error\n"); 7397d2be074SHaavard Skinnemoen data->error = -ETIMEDOUT; 7407d2be074SHaavard Skinnemoen } else if (status & MCI_DCRCE) { 7417d2be074SHaavard Skinnemoen dev_dbg(&mmc->class_dev, "data CRC error\n"); 7427d2be074SHaavard Skinnemoen data->error = -EILSEQ; 7437d2be074SHaavard Skinnemoen } else { 7447d2be074SHaavard Skinnemoen dev_dbg(&mmc->class_dev, 7457d2be074SHaavard Skinnemoen "data FIFO error (status=%08x)\n", 7467d2be074SHaavard Skinnemoen status); 7477d2be074SHaavard Skinnemoen data->error = -EIO; 7487d2be074SHaavard Skinnemoen } 7497d2be074SHaavard Skinnemoen 7507d2be074SHaavard Skinnemoen if (host->present && data->stop 7517d2be074SHaavard Skinnemoen && atmci_is_completed(host, EVENT_CMD_COMPLETE) 7527d2be074SHaavard Skinnemoen && !atmci_test_and_set_completed( 7537d2be074SHaavard Skinnemoen host, EVENT_STOP_SENT)) 7547d2be074SHaavard Skinnemoen send_stop_cmd(host->mmc, data); 7557d2be074SHaavard Skinnemoen 7567d2be074SHaavard Skinnemoen host->data = NULL; 7577d2be074SHaavard Skinnemoen } 7587d2be074SHaavard Skinnemoen if (atmci_test_and_clear_pending(host, EVENT_DATA_COMPLETE)) { 7597d2be074SHaavard Skinnemoen atmci_set_completed(host, EVENT_DATA_COMPLETE); 7607d2be074SHaavard Skinnemoen 7617d2be074SHaavard Skinnemoen if (!atmci_is_completed(host, EVENT_DATA_ERROR)) { 7627d2be074SHaavard Skinnemoen data->bytes_xfered = data->blocks * data->blksz; 7637d2be074SHaavard Skinnemoen data->error = 0; 7647d2be074SHaavard Skinnemoen } 7657d2be074SHaavard Skinnemoen 7667d2be074SHaavard Skinnemoen host->data = NULL; 7677d2be074SHaavard Skinnemoen } 7687d2be074SHaavard Skinnemoen 7697d2be074SHaavard Skinnemoen if (host->mrq && !host->cmd && !host->data) 7707d2be074SHaavard Skinnemoen atmci_request_end(mmc, host->mrq); 7717d2be074SHaavard Skinnemoen } 7727d2be074SHaavard Skinnemoen 7737d2be074SHaavard Skinnemoen static void atmci_read_data_pio(struct atmel_mci *host) 7747d2be074SHaavard Skinnemoen { 7757d2be074SHaavard Skinnemoen struct scatterlist *sg = host->sg; 7767d2be074SHaavard Skinnemoen void *buf = sg_virt(sg); 7777d2be074SHaavard Skinnemoen unsigned int offset = host->pio_offset; 7787d2be074SHaavard Skinnemoen struct mmc_data *data = host->data; 7797d2be074SHaavard Skinnemoen u32 value; 7807d2be074SHaavard Skinnemoen u32 status; 7817d2be074SHaavard Skinnemoen unsigned int nbytes = 0; 7827d2be074SHaavard Skinnemoen 7837d2be074SHaavard Skinnemoen do { 7847d2be074SHaavard Skinnemoen value = mci_readl(host, RDR); 7857d2be074SHaavard Skinnemoen if (likely(offset + 4 <= sg->length)) { 7867d2be074SHaavard Skinnemoen put_unaligned(value, (u32 *)(buf + offset)); 7877d2be074SHaavard Skinnemoen 7887d2be074SHaavard Skinnemoen offset += 4; 7897d2be074SHaavard Skinnemoen nbytes += 4; 7907d2be074SHaavard Skinnemoen 7917d2be074SHaavard Skinnemoen if (offset == sg->length) { 7927d2be074SHaavard Skinnemoen host->sg = sg = sg_next(sg); 7937d2be074SHaavard Skinnemoen if (!sg) 7947d2be074SHaavard Skinnemoen goto done; 7957d2be074SHaavard Skinnemoen 7967d2be074SHaavard Skinnemoen offset = 0; 7977d2be074SHaavard Skinnemoen buf = sg_virt(sg); 7987d2be074SHaavard Skinnemoen } 7997d2be074SHaavard Skinnemoen } else { 8007d2be074SHaavard Skinnemoen unsigned int remaining = sg->length - offset; 8017d2be074SHaavard Skinnemoen memcpy(buf + offset, &value, remaining); 8027d2be074SHaavard Skinnemoen nbytes += remaining; 8037d2be074SHaavard Skinnemoen 8047d2be074SHaavard Skinnemoen flush_dcache_page(sg_page(sg)); 8057d2be074SHaavard Skinnemoen host->sg = sg = sg_next(sg); 8067d2be074SHaavard Skinnemoen if (!sg) 8077d2be074SHaavard Skinnemoen goto done; 8087d2be074SHaavard Skinnemoen 8097d2be074SHaavard Skinnemoen offset = 4 - remaining; 8107d2be074SHaavard Skinnemoen buf = sg_virt(sg); 8117d2be074SHaavard Skinnemoen memcpy(buf, (u8 *)&value + remaining, offset); 8127d2be074SHaavard Skinnemoen nbytes += offset; 8137d2be074SHaavard Skinnemoen } 8147d2be074SHaavard Skinnemoen 8157d2be074SHaavard Skinnemoen status = mci_readl(host, SR); 8167d2be074SHaavard Skinnemoen if (status & ATMCI_DATA_ERROR_FLAGS) { 8177d2be074SHaavard Skinnemoen mci_writel(host, IDR, (MCI_NOTBUSY | MCI_RXRDY 8187d2be074SHaavard Skinnemoen | ATMCI_DATA_ERROR_FLAGS)); 8197d2be074SHaavard Skinnemoen host->data_status = status; 8207d2be074SHaavard Skinnemoen atmci_set_pending(host, EVENT_DATA_ERROR); 8217d2be074SHaavard Skinnemoen tasklet_schedule(&host->tasklet); 8227d2be074SHaavard Skinnemoen break; 8237d2be074SHaavard Skinnemoen } 8247d2be074SHaavard Skinnemoen } while (status & MCI_RXRDY); 8257d2be074SHaavard Skinnemoen 8267d2be074SHaavard Skinnemoen host->pio_offset = offset; 8277d2be074SHaavard Skinnemoen data->bytes_xfered += nbytes; 8287d2be074SHaavard Skinnemoen 8297d2be074SHaavard Skinnemoen return; 8307d2be074SHaavard Skinnemoen 8317d2be074SHaavard Skinnemoen done: 8327d2be074SHaavard Skinnemoen mci_writel(host, IDR, MCI_RXRDY); 8337d2be074SHaavard Skinnemoen mci_writel(host, IER, MCI_NOTBUSY); 8347d2be074SHaavard Skinnemoen data->bytes_xfered += nbytes; 8357d2be074SHaavard Skinnemoen atmci_set_completed(host, EVENT_XFER_COMPLETE); 8367d2be074SHaavard Skinnemoen if (data->stop && atmci_is_completed(host, EVENT_CMD_COMPLETE) 8377d2be074SHaavard Skinnemoen && !atmci_test_and_set_completed(host, EVENT_STOP_SENT)) 8387d2be074SHaavard Skinnemoen send_stop_cmd(host->mmc, data); 8397d2be074SHaavard Skinnemoen } 8407d2be074SHaavard Skinnemoen 8417d2be074SHaavard Skinnemoen static void atmci_write_data_pio(struct atmel_mci *host) 8427d2be074SHaavard Skinnemoen { 8437d2be074SHaavard Skinnemoen struct scatterlist *sg = host->sg; 8447d2be074SHaavard Skinnemoen void *buf = sg_virt(sg); 8457d2be074SHaavard Skinnemoen unsigned int offset = host->pio_offset; 8467d2be074SHaavard Skinnemoen struct mmc_data *data = host->data; 8477d2be074SHaavard Skinnemoen u32 value; 8487d2be074SHaavard Skinnemoen u32 status; 8497d2be074SHaavard Skinnemoen unsigned int nbytes = 0; 8507d2be074SHaavard Skinnemoen 8517d2be074SHaavard Skinnemoen do { 8527d2be074SHaavard Skinnemoen if (likely(offset + 4 <= sg->length)) { 8537d2be074SHaavard Skinnemoen value = get_unaligned((u32 *)(buf + offset)); 8547d2be074SHaavard Skinnemoen mci_writel(host, TDR, value); 8557d2be074SHaavard Skinnemoen 8567d2be074SHaavard Skinnemoen offset += 4; 8577d2be074SHaavard Skinnemoen nbytes += 4; 8587d2be074SHaavard Skinnemoen if (offset == sg->length) { 8597d2be074SHaavard Skinnemoen host->sg = sg = sg_next(sg); 8607d2be074SHaavard Skinnemoen if (!sg) 8617d2be074SHaavard Skinnemoen goto done; 8627d2be074SHaavard Skinnemoen 8637d2be074SHaavard Skinnemoen offset = 0; 8647d2be074SHaavard Skinnemoen buf = sg_virt(sg); 8657d2be074SHaavard Skinnemoen } 8667d2be074SHaavard Skinnemoen } else { 8677d2be074SHaavard Skinnemoen unsigned int remaining = sg->length - offset; 8687d2be074SHaavard Skinnemoen 8697d2be074SHaavard Skinnemoen value = 0; 8707d2be074SHaavard Skinnemoen memcpy(&value, buf + offset, remaining); 8717d2be074SHaavard Skinnemoen nbytes += remaining; 8727d2be074SHaavard Skinnemoen 8737d2be074SHaavard Skinnemoen host->sg = sg = sg_next(sg); 8747d2be074SHaavard Skinnemoen if (!sg) { 8757d2be074SHaavard Skinnemoen mci_writel(host, TDR, value); 8767d2be074SHaavard Skinnemoen goto done; 8777d2be074SHaavard Skinnemoen } 8787d2be074SHaavard Skinnemoen 8797d2be074SHaavard Skinnemoen offset = 4 - remaining; 8807d2be074SHaavard Skinnemoen buf = sg_virt(sg); 8817d2be074SHaavard Skinnemoen memcpy((u8 *)&value + remaining, buf, offset); 8827d2be074SHaavard Skinnemoen mci_writel(host, TDR, value); 8837d2be074SHaavard Skinnemoen nbytes += offset; 8847d2be074SHaavard Skinnemoen } 8857d2be074SHaavard Skinnemoen 8867d2be074SHaavard Skinnemoen status = mci_readl(host, SR); 8877d2be074SHaavard Skinnemoen if (status & ATMCI_DATA_ERROR_FLAGS) { 8887d2be074SHaavard Skinnemoen mci_writel(host, IDR, (MCI_NOTBUSY | MCI_TXRDY 8897d2be074SHaavard Skinnemoen | ATMCI_DATA_ERROR_FLAGS)); 8907d2be074SHaavard Skinnemoen host->data_status = status; 8917d2be074SHaavard Skinnemoen atmci_set_pending(host, EVENT_DATA_ERROR); 8927d2be074SHaavard Skinnemoen tasklet_schedule(&host->tasklet); 8937d2be074SHaavard Skinnemoen break; 8947d2be074SHaavard Skinnemoen } 8957d2be074SHaavard Skinnemoen } while (status & MCI_TXRDY); 8967d2be074SHaavard Skinnemoen 8977d2be074SHaavard Skinnemoen host->pio_offset = offset; 8987d2be074SHaavard Skinnemoen data->bytes_xfered += nbytes; 8997d2be074SHaavard Skinnemoen 9007d2be074SHaavard Skinnemoen return; 9017d2be074SHaavard Skinnemoen 9027d2be074SHaavard Skinnemoen done: 9037d2be074SHaavard Skinnemoen mci_writel(host, IDR, MCI_TXRDY); 9047d2be074SHaavard Skinnemoen mci_writel(host, IER, MCI_NOTBUSY); 9057d2be074SHaavard Skinnemoen data->bytes_xfered += nbytes; 9067d2be074SHaavard Skinnemoen atmci_set_completed(host, EVENT_XFER_COMPLETE); 9077d2be074SHaavard Skinnemoen if (data->stop && atmci_is_completed(host, EVENT_CMD_COMPLETE) 9087d2be074SHaavard Skinnemoen && !atmci_test_and_set_completed(host, EVENT_STOP_SENT)) 9097d2be074SHaavard Skinnemoen send_stop_cmd(host->mmc, data); 9107d2be074SHaavard Skinnemoen } 9117d2be074SHaavard Skinnemoen 9127d2be074SHaavard Skinnemoen static void atmci_cmd_interrupt(struct mmc_host *mmc, u32 status) 9137d2be074SHaavard Skinnemoen { 9147d2be074SHaavard Skinnemoen struct atmel_mci *host = mmc_priv(mmc); 9157d2be074SHaavard Skinnemoen 9167d2be074SHaavard Skinnemoen mci_writel(host, IDR, MCI_CMDRDY); 9177d2be074SHaavard Skinnemoen 9187d2be074SHaavard Skinnemoen if (atmci_is_completed(host, EVENT_STOP_SENT)) { 9197d2be074SHaavard Skinnemoen host->stop_status = status; 9207d2be074SHaavard Skinnemoen atmci_set_pending(host, EVENT_STOP_COMPLETE); 9217d2be074SHaavard Skinnemoen } else { 9227d2be074SHaavard Skinnemoen host->cmd_status = status; 9237d2be074SHaavard Skinnemoen atmci_set_pending(host, EVENT_CMD_COMPLETE); 9247d2be074SHaavard Skinnemoen } 9257d2be074SHaavard Skinnemoen 9267d2be074SHaavard Skinnemoen tasklet_schedule(&host->tasklet); 9277d2be074SHaavard Skinnemoen } 9287d2be074SHaavard Skinnemoen 9297d2be074SHaavard Skinnemoen static irqreturn_t atmci_interrupt(int irq, void *dev_id) 9307d2be074SHaavard Skinnemoen { 9317d2be074SHaavard Skinnemoen struct mmc_host *mmc = dev_id; 9327d2be074SHaavard Skinnemoen struct atmel_mci *host = mmc_priv(mmc); 9337d2be074SHaavard Skinnemoen u32 status, mask, pending; 9347d2be074SHaavard Skinnemoen unsigned int pass_count = 0; 9357d2be074SHaavard Skinnemoen 9367d2be074SHaavard Skinnemoen spin_lock(&mmc->lock); 9377d2be074SHaavard Skinnemoen 9387d2be074SHaavard Skinnemoen do { 9397d2be074SHaavard Skinnemoen status = mci_readl(host, SR); 9407d2be074SHaavard Skinnemoen mask = mci_readl(host, IMR); 9417d2be074SHaavard Skinnemoen pending = status & mask; 9427d2be074SHaavard Skinnemoen if (!pending) 9437d2be074SHaavard Skinnemoen break; 9447d2be074SHaavard Skinnemoen 9457d2be074SHaavard Skinnemoen if (pending & ATMCI_DATA_ERROR_FLAGS) { 9467d2be074SHaavard Skinnemoen mci_writel(host, IDR, ATMCI_DATA_ERROR_FLAGS 9477d2be074SHaavard Skinnemoen | MCI_RXRDY | MCI_TXRDY); 9487d2be074SHaavard Skinnemoen pending &= mci_readl(host, IMR); 9497d2be074SHaavard Skinnemoen host->data_status = status; 9507d2be074SHaavard Skinnemoen atmci_set_pending(host, EVENT_DATA_ERROR); 9517d2be074SHaavard Skinnemoen tasklet_schedule(&host->tasklet); 9527d2be074SHaavard Skinnemoen } 9537d2be074SHaavard Skinnemoen if (pending & MCI_NOTBUSY) { 9547d2be074SHaavard Skinnemoen mci_writel(host, IDR, (MCI_NOTBUSY 9557d2be074SHaavard Skinnemoen | ATMCI_DATA_ERROR_FLAGS)); 9567d2be074SHaavard Skinnemoen atmci_set_pending(host, EVENT_DATA_COMPLETE); 9577d2be074SHaavard Skinnemoen tasklet_schedule(&host->tasklet); 9587d2be074SHaavard Skinnemoen } 9597d2be074SHaavard Skinnemoen if (pending & MCI_RXRDY) 9607d2be074SHaavard Skinnemoen atmci_read_data_pio(host); 9617d2be074SHaavard Skinnemoen if (pending & MCI_TXRDY) 9627d2be074SHaavard Skinnemoen atmci_write_data_pio(host); 9637d2be074SHaavard Skinnemoen 9647d2be074SHaavard Skinnemoen if (pending & MCI_CMDRDY) 9657d2be074SHaavard Skinnemoen atmci_cmd_interrupt(mmc, status); 9667d2be074SHaavard Skinnemoen } while (pass_count++ < 5); 9677d2be074SHaavard Skinnemoen 9687d2be074SHaavard Skinnemoen spin_unlock(&mmc->lock); 9697d2be074SHaavard Skinnemoen 9707d2be074SHaavard Skinnemoen return pass_count ? IRQ_HANDLED : IRQ_NONE; 9717d2be074SHaavard Skinnemoen } 9727d2be074SHaavard Skinnemoen 9737d2be074SHaavard Skinnemoen static irqreturn_t atmci_detect_interrupt(int irq, void *dev_id) 9747d2be074SHaavard Skinnemoen { 9757d2be074SHaavard Skinnemoen struct mmc_host *mmc = dev_id; 9767d2be074SHaavard Skinnemoen struct atmel_mci *host = mmc_priv(mmc); 9777d2be074SHaavard Skinnemoen 9787d2be074SHaavard Skinnemoen /* 9797d2be074SHaavard Skinnemoen * Disable interrupts until the pin has stabilized and check 9807d2be074SHaavard Skinnemoen * the state then. Use mod_timer() since we may be in the 9817d2be074SHaavard Skinnemoen * middle of the timer routine when this interrupt triggers. 9827d2be074SHaavard Skinnemoen */ 9837d2be074SHaavard Skinnemoen disable_irq_nosync(irq); 9847d2be074SHaavard Skinnemoen mod_timer(&host->detect_timer, jiffies + msecs_to_jiffies(20)); 9857d2be074SHaavard Skinnemoen 9867d2be074SHaavard Skinnemoen return IRQ_HANDLED; 9877d2be074SHaavard Skinnemoen } 9887d2be074SHaavard Skinnemoen 9897d2be074SHaavard Skinnemoen static int __init atmci_probe(struct platform_device *pdev) 9907d2be074SHaavard Skinnemoen { 9917d2be074SHaavard Skinnemoen struct mci_platform_data *pdata; 9927d2be074SHaavard Skinnemoen struct atmel_mci *host; 9937d2be074SHaavard Skinnemoen struct mmc_host *mmc; 9947d2be074SHaavard Skinnemoen struct resource *regs; 9957d2be074SHaavard Skinnemoen int irq; 9967d2be074SHaavard Skinnemoen int ret; 9977d2be074SHaavard Skinnemoen 9987d2be074SHaavard Skinnemoen regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); 9997d2be074SHaavard Skinnemoen if (!regs) 10007d2be074SHaavard Skinnemoen return -ENXIO; 10017d2be074SHaavard Skinnemoen pdata = pdev->dev.platform_data; 10027d2be074SHaavard Skinnemoen if (!pdata) 10037d2be074SHaavard Skinnemoen return -ENXIO; 10047d2be074SHaavard Skinnemoen irq = platform_get_irq(pdev, 0); 10057d2be074SHaavard Skinnemoen if (irq < 0) 10067d2be074SHaavard Skinnemoen return irq; 10077d2be074SHaavard Skinnemoen 10087d2be074SHaavard Skinnemoen mmc = mmc_alloc_host(sizeof(struct atmel_mci), &pdev->dev); 10097d2be074SHaavard Skinnemoen if (!mmc) 10107d2be074SHaavard Skinnemoen return -ENOMEM; 10117d2be074SHaavard Skinnemoen 10127d2be074SHaavard Skinnemoen host = mmc_priv(mmc); 10137d2be074SHaavard Skinnemoen host->pdev = pdev; 10147d2be074SHaavard Skinnemoen host->mmc = mmc; 10157d2be074SHaavard Skinnemoen host->detect_pin = pdata->detect_pin; 10167d2be074SHaavard Skinnemoen host->wp_pin = pdata->wp_pin; 10177d2be074SHaavard Skinnemoen 10187d2be074SHaavard Skinnemoen host->mck = clk_get(&pdev->dev, "mci_clk"); 10197d2be074SHaavard Skinnemoen if (IS_ERR(host->mck)) { 10207d2be074SHaavard Skinnemoen ret = PTR_ERR(host->mck); 10217d2be074SHaavard Skinnemoen goto err_clk_get; 10227d2be074SHaavard Skinnemoen } 10237d2be074SHaavard Skinnemoen 10247d2be074SHaavard Skinnemoen ret = -ENOMEM; 10257d2be074SHaavard Skinnemoen host->regs = ioremap(regs->start, regs->end - regs->start + 1); 10267d2be074SHaavard Skinnemoen if (!host->regs) 10277d2be074SHaavard Skinnemoen goto err_ioremap; 10287d2be074SHaavard Skinnemoen 10297d2be074SHaavard Skinnemoen clk_enable(host->mck); 10307d2be074SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_SWRST); 10317d2be074SHaavard Skinnemoen host->bus_hz = clk_get_rate(host->mck); 10327d2be074SHaavard Skinnemoen clk_disable(host->mck); 10337d2be074SHaavard Skinnemoen 10347d2be074SHaavard Skinnemoen host->mapbase = regs->start; 10357d2be074SHaavard Skinnemoen 10367d2be074SHaavard Skinnemoen mmc->ops = &atmci_ops; 10377d2be074SHaavard Skinnemoen mmc->f_min = (host->bus_hz + 511) / 512; 10387d2be074SHaavard Skinnemoen mmc->f_max = host->bus_hz / 2; 10397d2be074SHaavard Skinnemoen mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; 104023af6039SPierre Ossman mmc->caps |= MMC_CAP_4_BIT_DATA; 10417d2be074SHaavard Skinnemoen 10427d2be074SHaavard Skinnemoen mmc->max_hw_segs = 64; 10437d2be074SHaavard Skinnemoen mmc->max_phys_segs = 64; 10447d2be074SHaavard Skinnemoen mmc->max_req_size = 32768 * 512; 10457d2be074SHaavard Skinnemoen mmc->max_blk_size = 32768; 10467d2be074SHaavard Skinnemoen mmc->max_blk_count = 512; 10477d2be074SHaavard Skinnemoen 10487d2be074SHaavard Skinnemoen tasklet_init(&host->tasklet, atmci_tasklet_func, (unsigned long)mmc); 10497d2be074SHaavard Skinnemoen 10507d2be074SHaavard Skinnemoen ret = request_irq(irq, atmci_interrupt, 0, pdev->dev.bus_id, mmc); 10517d2be074SHaavard Skinnemoen if (ret) 10527d2be074SHaavard Skinnemoen goto err_request_irq; 10537d2be074SHaavard Skinnemoen 10547d2be074SHaavard Skinnemoen /* Assume card is present if we don't have a detect pin */ 10557d2be074SHaavard Skinnemoen host->present = 1; 10563c26e170SDavid Brownell if (gpio_is_valid(host->detect_pin)) { 10577d2be074SHaavard Skinnemoen if (gpio_request(host->detect_pin, "mmc_detect")) { 10587d2be074SHaavard Skinnemoen dev_dbg(&mmc->class_dev, "no detect pin available\n"); 10597d2be074SHaavard Skinnemoen host->detect_pin = -1; 10607d2be074SHaavard Skinnemoen } else { 10617d2be074SHaavard Skinnemoen host->present = !gpio_get_value(host->detect_pin); 10627d2be074SHaavard Skinnemoen } 10637d2be074SHaavard Skinnemoen } 1064da45b66eSHaavard Skinnemoen 1065da45b66eSHaavard Skinnemoen if (!gpio_is_valid(host->detect_pin)) 1066da45b66eSHaavard Skinnemoen mmc->caps |= MMC_CAP_NEEDS_POLL; 1067da45b66eSHaavard Skinnemoen 10683c26e170SDavid Brownell if (gpio_is_valid(host->wp_pin)) { 10697d2be074SHaavard Skinnemoen if (gpio_request(host->wp_pin, "mmc_wp")) { 10707d2be074SHaavard Skinnemoen dev_dbg(&mmc->class_dev, "no WP pin available\n"); 10717d2be074SHaavard Skinnemoen host->wp_pin = -1; 10727d2be074SHaavard Skinnemoen } 10737d2be074SHaavard Skinnemoen } 10747d2be074SHaavard Skinnemoen 10757d2be074SHaavard Skinnemoen platform_set_drvdata(pdev, host); 10767d2be074SHaavard Skinnemoen 10777d2be074SHaavard Skinnemoen mmc_add_host(mmc); 10787d2be074SHaavard Skinnemoen 10793c26e170SDavid Brownell if (gpio_is_valid(host->detect_pin)) { 10807d2be074SHaavard Skinnemoen setup_timer(&host->detect_timer, atmci_detect_change, 10817d2be074SHaavard Skinnemoen (unsigned long)host); 10827d2be074SHaavard Skinnemoen 10837d2be074SHaavard Skinnemoen ret = request_irq(gpio_to_irq(host->detect_pin), 10847d2be074SHaavard Skinnemoen atmci_detect_interrupt, 10857d2be074SHaavard Skinnemoen IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING, 10867d2be074SHaavard Skinnemoen "mmc-detect", mmc); 10877d2be074SHaavard Skinnemoen if (ret) { 10887d2be074SHaavard Skinnemoen dev_dbg(&mmc->class_dev, 10897d2be074SHaavard Skinnemoen "could not request IRQ %d for detect pin\n", 10907d2be074SHaavard Skinnemoen gpio_to_irq(host->detect_pin)); 10917d2be074SHaavard Skinnemoen gpio_free(host->detect_pin); 10927d2be074SHaavard Skinnemoen host->detect_pin = -1; 10937d2be074SHaavard Skinnemoen } 10947d2be074SHaavard Skinnemoen } 10957d2be074SHaavard Skinnemoen 10967d2be074SHaavard Skinnemoen dev_info(&mmc->class_dev, 10977d2be074SHaavard Skinnemoen "Atmel MCI controller at 0x%08lx irq %d\n", 10987d2be074SHaavard Skinnemoen host->mapbase, irq); 10997d2be074SHaavard Skinnemoen 1100deec9ae3SHaavard Skinnemoen atmci_init_debugfs(host); 1101deec9ae3SHaavard Skinnemoen 11027d2be074SHaavard Skinnemoen return 0; 11037d2be074SHaavard Skinnemoen 11047d2be074SHaavard Skinnemoen err_request_irq: 11057d2be074SHaavard Skinnemoen iounmap(host->regs); 11067d2be074SHaavard Skinnemoen err_ioremap: 11077d2be074SHaavard Skinnemoen clk_put(host->mck); 11087d2be074SHaavard Skinnemoen err_clk_get: 11097d2be074SHaavard Skinnemoen mmc_free_host(mmc); 11107d2be074SHaavard Skinnemoen return ret; 11117d2be074SHaavard Skinnemoen } 11127d2be074SHaavard Skinnemoen 11137d2be074SHaavard Skinnemoen static int __exit atmci_remove(struct platform_device *pdev) 11147d2be074SHaavard Skinnemoen { 11157d2be074SHaavard Skinnemoen struct atmel_mci *host = platform_get_drvdata(pdev); 11167d2be074SHaavard Skinnemoen 11177d2be074SHaavard Skinnemoen platform_set_drvdata(pdev, NULL); 11187d2be074SHaavard Skinnemoen 11197d2be074SHaavard Skinnemoen if (host) { 1120deec9ae3SHaavard Skinnemoen /* Debugfs stuff is cleaned up by mmc core */ 1121deec9ae3SHaavard Skinnemoen 11223c26e170SDavid Brownell if (gpio_is_valid(host->detect_pin)) { 11237d2be074SHaavard Skinnemoen int pin = host->detect_pin; 11247d2be074SHaavard Skinnemoen 11257d2be074SHaavard Skinnemoen /* Make sure the timer doesn't enable the interrupt */ 11267d2be074SHaavard Skinnemoen host->detect_pin = -1; 11277d2be074SHaavard Skinnemoen smp_wmb(); 11287d2be074SHaavard Skinnemoen 11297d2be074SHaavard Skinnemoen free_irq(gpio_to_irq(pin), host->mmc); 11307d2be074SHaavard Skinnemoen del_timer_sync(&host->detect_timer); 11317d2be074SHaavard Skinnemoen gpio_free(pin); 11327d2be074SHaavard Skinnemoen } 11337d2be074SHaavard Skinnemoen 11347d2be074SHaavard Skinnemoen mmc_remove_host(host->mmc); 11357d2be074SHaavard Skinnemoen 11367d2be074SHaavard Skinnemoen clk_enable(host->mck); 11377d2be074SHaavard Skinnemoen mci_writel(host, IDR, ~0UL); 11387d2be074SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_MCIDIS); 11397d2be074SHaavard Skinnemoen mci_readl(host, SR); 11407d2be074SHaavard Skinnemoen clk_disable(host->mck); 11417d2be074SHaavard Skinnemoen 11423c26e170SDavid Brownell if (gpio_is_valid(host->wp_pin)) 11437d2be074SHaavard Skinnemoen gpio_free(host->wp_pin); 11447d2be074SHaavard Skinnemoen 11457d2be074SHaavard Skinnemoen free_irq(platform_get_irq(pdev, 0), host->mmc); 11467d2be074SHaavard Skinnemoen iounmap(host->regs); 11477d2be074SHaavard Skinnemoen 11487d2be074SHaavard Skinnemoen clk_put(host->mck); 11497d2be074SHaavard Skinnemoen 11507d2be074SHaavard Skinnemoen mmc_free_host(host->mmc); 11517d2be074SHaavard Skinnemoen } 11527d2be074SHaavard Skinnemoen return 0; 11537d2be074SHaavard Skinnemoen } 11547d2be074SHaavard Skinnemoen 11557d2be074SHaavard Skinnemoen static struct platform_driver atmci_driver = { 11567d2be074SHaavard Skinnemoen .remove = __exit_p(atmci_remove), 11577d2be074SHaavard Skinnemoen .driver = { 11587d2be074SHaavard Skinnemoen .name = "atmel_mci", 11597d2be074SHaavard Skinnemoen }, 11607d2be074SHaavard Skinnemoen }; 11617d2be074SHaavard Skinnemoen 11627d2be074SHaavard Skinnemoen static int __init atmci_init(void) 11637d2be074SHaavard Skinnemoen { 11647d2be074SHaavard Skinnemoen return platform_driver_probe(&atmci_driver, atmci_probe); 11657d2be074SHaavard Skinnemoen } 11667d2be074SHaavard Skinnemoen 11677d2be074SHaavard Skinnemoen static void __exit atmci_exit(void) 11687d2be074SHaavard Skinnemoen { 11697d2be074SHaavard Skinnemoen platform_driver_unregister(&atmci_driver); 11707d2be074SHaavard Skinnemoen } 11717d2be074SHaavard Skinnemoen 11727d2be074SHaavard Skinnemoen module_init(atmci_init); 11737d2be074SHaavard Skinnemoen module_exit(atmci_exit); 11747d2be074SHaavard Skinnemoen 11757d2be074SHaavard Skinnemoen MODULE_DESCRIPTION("Atmel Multimedia Card Interface driver"); 11767d2be074SHaavard Skinnemoen MODULE_AUTHOR("Haavard Skinnemoen <haavard.skinnemoen@atmel.com>"); 11777d2be074SHaavard Skinnemoen MODULE_LICENSE("GPL v2"); 1178