2 * ARM PrimeCell MultiMedia Card Interface - PL180
4 * Copyright (C) ST-Ericsson SA 2010
6 * Author: Ulf Hansson <ulf.hansson@stericsson.com>
7 * Author: Martin Lundholm <martin.xa.lundholm@stericsson.com>
8 * Ported to drivers/mmc/ by: Matt Waddel <matt.waddel@linaro.org>
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
32 #include "arm_pl180_mmci.h"
36 struct sdi_registers *base;
39 static int wait_for_command_end(struct mmc *dev, struct mmc_cmd *cmd)
41 u32 hoststatus, statusmask;
42 struct mmc_host *host = dev->priv;
44 statusmask = SDI_STA_CTIMEOUT | SDI_STA_CCRCFAIL;
45 if ((cmd->resp_type & MMC_RSP_PRESENT))
46 statusmask |= SDI_STA_CMDREND;
48 statusmask |= SDI_STA_CMDSENT;
51 hoststatus = readl(&host->base->status) & statusmask;
54 writel(statusmask, &host->base->status_clear);
55 if (hoststatus & SDI_STA_CTIMEOUT) {
56 printf("CMD%d time out\n", cmd->cmdidx);
58 } else if ((hoststatus & SDI_STA_CCRCFAIL) &&
59 (cmd->flags & MMC_RSP_CRC)) {
60 printf("CMD%d CRC error\n", cmd->cmdidx);
64 if (cmd->resp_type & MMC_RSP_PRESENT) {
65 cmd->response[0] = readl(&host->base->response0);
66 cmd->response[1] = readl(&host->base->response1);
67 cmd->response[2] = readl(&host->base->response2);
68 cmd->response[3] = readl(&host->base->response3);
69 debug("CMD%d response[0]:0x%08X, response[1]:0x%08X, "
70 "response[2]:0x%08X, response[3]:0x%08X\n",
71 cmd->cmdidx, cmd->response[0], cmd->response[1],
72 cmd->response[2], cmd->response[3]);
78 /* send command to the mmc card and wait for results */
79 static int do_command(struct mmc *dev, struct mmc_cmd *cmd)
83 struct mmc_host *host = dev->priv;
85 sdi_cmd = ((cmd->cmdidx & SDI_CMD_CMDINDEX_MASK) | SDI_CMD_CPSMEN);
88 sdi_cmd |= SDI_CMD_WAITRESP;
89 if (cmd->resp_type & MMC_RSP_136)
90 sdi_cmd |= SDI_CMD_LONGRESP;
93 writel((u32)cmd->cmdarg, &host->base->argument);
94 udelay(COMMAND_REG_DELAY);
95 writel(sdi_cmd, &host->base->command);
96 result = wait_for_command_end(dev, cmd);
98 /* After CMD2 set RCA to a none zero value. */
99 if ((result == 0) && (cmd->cmdidx == MMC_CMD_ALL_SEND_CID))
102 /* After CMD3 open drain is switched off and push pull is used. */
103 if ((result == 0) && (cmd->cmdidx == MMC_CMD_SET_RELATIVE_ADDR)) {
104 u32 sdi_pwr = readl(&host->base->power) & ~SDI_PWR_OPD;
105 writel(sdi_pwr, &host->base->power);
111 static int read_bytes(struct mmc *dev, u32 *dest, u32 blkcount, u32 blksize)
113 u32 *tempbuff = dest;
115 u64 xfercount = blkcount * blksize;
116 struct mmc_host *host = dev->priv;
117 u32 status, status_err;
119 debug("read_bytes: blkcount=%u blksize=%u\n", blkcount, blksize);
121 status = readl(&host->base->status);
122 status_err = status & (SDI_STA_DCRCFAIL | SDI_STA_DTIMEOUT |
124 while (!status_err &&
125 (xfercount >= SDI_FIFO_BURST_SIZE * sizeof(u32))) {
126 if (status & SDI_STA_RXFIFOBR) {
127 for (i = 0; i < SDI_FIFO_BURST_SIZE; i++)
128 *(tempbuff + i) = readl(&host->base->fifo);
129 tempbuff += SDI_FIFO_BURST_SIZE;
130 xfercount -= SDI_FIFO_BURST_SIZE * sizeof(u32);
132 status = readl(&host->base->status);
133 status_err = status &
134 (SDI_STA_DCRCFAIL | SDI_STA_DTIMEOUT | SDI_STA_RXOVERR);
137 if (status & SDI_STA_DTIMEOUT) {
138 printf("Read data timed out, xfercount: %llu, status: 0x%08X\n",
141 } else if (status & SDI_STA_DCRCFAIL) {
142 printf("Read data blk CRC error: 0x%x\n", status);
144 } else if (status & SDI_STA_RXOVERR) {
145 printf("Read data RX overflow error\n");
149 while ((!status_err) && (xfercount >= sizeof(u32))) {
150 if (status & SDI_STA_RXDAVL) {
151 *(tempbuff) = readl(&host->base->fifo);
153 xfercount -= sizeof(u32);
155 status = readl(&host->base->status);
156 status_err = status & (SDI_STA_DCRCFAIL | SDI_STA_DTIMEOUT |
160 status_err = status &
161 (SDI_STA_DCRCFAIL | SDI_STA_DTIMEOUT | SDI_STA_DBCKEND |
163 while (!status_err) {
164 status = readl(&host->base->status);
165 status_err = status &
166 (SDI_STA_DCRCFAIL | SDI_STA_DTIMEOUT | SDI_STA_DBCKEND |
170 if (status & SDI_STA_DTIMEOUT) {
171 printf("Read data timed out, xfercount: %llu, status: 0x%08X\n",
174 } else if (status & SDI_STA_DCRCFAIL) {
175 printf("Read data bytes CRC error: 0x%x\n", status);
177 } else if (status & SDI_STA_RXOVERR) {
178 printf("Read data RX overflow error\n");
182 writel(SDI_ICR_MASK, &host->base->status_clear);
185 printf("Read data error, xfercount: %llu\n", xfercount);
192 static int write_bytes(struct mmc *dev, u32 *src, u32 blkcount, u32 blksize)
196 u64 xfercount = blkcount * blksize;
197 struct mmc_host *host = dev->priv;
198 u32 status, status_err;
200 debug("write_bytes: blkcount=%u blksize=%u\n", blkcount, blksize);
202 status = readl(&host->base->status);
203 status_err = status & (SDI_STA_DCRCFAIL | SDI_STA_DTIMEOUT);
204 while (!status_err && xfercount) {
205 if (status & SDI_STA_TXFIFOBW) {
206 if (xfercount >= SDI_FIFO_BURST_SIZE * sizeof(u32)) {
207 for (i = 0; i < SDI_FIFO_BURST_SIZE; i++)
208 writel(*(tempbuff + i),
210 tempbuff += SDI_FIFO_BURST_SIZE;
211 xfercount -= SDI_FIFO_BURST_SIZE * sizeof(u32);
213 while (xfercount >= sizeof(u32)) {
214 writel(*(tempbuff), &host->base->fifo);
216 xfercount -= sizeof(u32);
220 status = readl(&host->base->status);
221 status_err = status & (SDI_STA_DCRCFAIL | SDI_STA_DTIMEOUT);
224 status_err = status &
225 (SDI_STA_DCRCFAIL | SDI_STA_DTIMEOUT | SDI_STA_DBCKEND);
226 while (!status_err) {
227 status = readl(&host->base->status);
228 status_err = status &
229 (SDI_STA_DCRCFAIL | SDI_STA_DTIMEOUT | SDI_STA_DBCKEND);
232 if (status & SDI_STA_DTIMEOUT) {
233 printf("Write data timed out, xfercount:%llu,status:0x%08X\n",
236 } else if (status & SDI_STA_DCRCFAIL) {
237 printf("Write data CRC error\n");
241 writel(SDI_ICR_MASK, &host->base->status_clear);
244 printf("Write data error, xfercount:%llu", xfercount);
251 static int do_data_transfer(struct mmc *dev,
253 struct mmc_data *data)
255 int error = -ETIMEDOUT;
256 struct mmc_host *host = dev->priv;
259 u32 data_len = (u32) (data->blocks * data->blocksize);
261 blksz = (ffs(data->blocksize) - 1);
262 data_ctrl |= ((blksz << 4) & SDI_DCTRL_DBLKSIZE_MASK);
263 data_ctrl |= SDI_DCTRL_DTEN;
265 writel(SDI_DTIMER_DEFAULT, &host->base->datatimer);
266 writel(data_len, &host->base->datalength);
267 udelay(DATA_REG_DELAY);
269 if (data->flags & MMC_DATA_READ) {
270 data_ctrl |= SDI_DCTRL_DTDIR_IN;
271 writel(data_ctrl, &host->base->datactrl);
273 error = do_command(dev, cmd);
277 error = read_bytes(dev, (u32 *)data->dest, (u32)data->blocks,
278 (u32)data->blocksize);
279 } else if (data->flags & MMC_DATA_WRITE) {
280 error = do_command(dev, cmd);
284 writel(data_ctrl, &host->base->datactrl);
285 error = write_bytes(dev, (u32 *)data->src, (u32)data->blocks,
286 (u32)data->blocksize);
292 static int host_request(struct mmc *dev,
294 struct mmc_data *data)
299 result = do_data_transfer(dev, cmd, data);
301 result = do_command(dev, cmd);
306 /* MMC uses open drain drivers in the enumeration phase */
307 static int mmc_host_reset(struct mmc *dev)
309 struct mmc_host *host = dev->priv;
310 u32 sdi_u32 = SDI_PWR_OPD | SDI_PWR_PWRCTRL_ON;
312 writel(sdi_u32, &host->base->power);
317 static void host_set_ios(struct mmc *dev)
319 struct mmc_host *host = dev->priv;
322 sdi_clkcr = readl(&host->base->clock);
324 /* Ramp up the clock rate */
328 if (dev->clock >= dev->f_max)
329 dev->clock = dev->f_max;
331 clkdiv = ((ARM_MCLK / dev->clock) / 2) - 1;
333 if (clkdiv > SDI_CLKCR_CLKDIV_MASK)
334 clkdiv = SDI_CLKCR_CLKDIV_MASK;
336 sdi_clkcr &= ~(SDI_CLKCR_CLKDIV_MASK);
340 /* Set the bus width */
341 if (dev->bus_width) {
344 switch (dev->bus_width) {
346 buswidth |= SDI_CLKCR_WIDBUS_1;
349 buswidth |= SDI_CLKCR_WIDBUS_4;
352 printf("Invalid bus width\n");
355 sdi_clkcr &= ~(SDI_CLKCR_WIDBUS_MASK);
356 sdi_clkcr |= buswidth;
359 writel(sdi_clkcr, &host->base->clock);
360 udelay(CLK_CHANGE_DELAY);
363 struct mmc *alloc_mmc_struct(void)
365 struct mmc_host *host = NULL;
366 struct mmc *mmc_device = NULL;
368 host = malloc(sizeof(struct mmc_host));
372 mmc_device = malloc(sizeof(struct mmc));
376 mmc_device->priv = host;
385 * mmc_host_init - initialize the mmc controller.
386 * Set initial clock and power for mmc slot.
387 * Initialize mmc struct and register with mmc framework.
389 static int arm_pl180_mmci_host_init(struct mmc *dev)
391 struct mmc_host *host = dev->priv;
394 host->base = (struct sdi_registers *)CONFIG_ARM_PL180_MMCI_BASE;
396 /* Initially set power-on, full voltage & MMCI read */
398 writel(sdi_u32, &host->base->power);
400 /* setting clk freq 505KHz */
401 sdi_u32 = SDI_CLKCR_CLKDIV_INIT | SDI_CLKCR_CLKEN;
402 writel(sdi_u32, &host->base->clock);
403 udelay(CLK_CHANGE_DELAY);
405 /* Disable mmc interrupts */
406 sdi_u32 = readl(&host->base->mask0) & ~SDI_MASK0_MASK;
407 writel(sdi_u32, &host->base->mask0);
409 sprintf(dev->name, "MMC");
410 dev->clock = ARM_MCLK / (2 * (SDI_CLKCR_CLKDIV_INIT + 1));
411 dev->send_cmd = host_request;
412 dev->set_ios = host_set_ios;
413 dev->init = mmc_host_reset;
415 dev->voltages = VOLTAGE_WINDOW_MMC;
416 dev->f_min = dev->clock;
417 dev->f_max = CONFIG_ARM_PL180_MMCI_CLOCK_FREQ;
422 int arm_pl180_mmci_init(void)
427 dev = alloc_mmc_struct();
431 error = arm_pl180_mmci_host_init(dev);
433 printf("mmci_host_init error - %d\n", error);
440 debug("registered mmc interface number is:%d\n", dev->block_dev.dev);