1 /* Driver for Realtek PCI-Express card reader
3 * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2, or (at your option) any
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, see <http://www.gnu.org/licenses/>.
19 * Wei WANG <wei_wang@realsil.com.cn>
22 #include <linux/pci.h>
23 #include <linux/module.h>
24 #include <linux/slab.h>
25 #include <linux/dma-mapping.h>
26 #include <linux/highmem.h>
27 #include <linux/interrupt.h>
28 #include <linux/delay.h>
29 #include <linux/idr.h>
30 #include <linux/platform_device.h>
31 #include <linux/mfd/core.h>
32 #include <linux/mfd/rtsx_pci.h>
33 #include <asm/unaligned.h>
37 static bool msi_en = true;
38 module_param(msi_en, bool, S_IRUGO | S_IWUSR);
39 MODULE_PARM_DESC(msi_en, "Enable MSI");
41 static DEFINE_IDR(rtsx_pci_idr);
42 static DEFINE_SPINLOCK(rtsx_pci_lock);
44 static struct mfd_cell rtsx_pcr_cells[] = {
46 .name = DRV_NAME_RTSX_PCI_SDMMC,
49 .name = DRV_NAME_RTSX_PCI_MS,
53 static DEFINE_PCI_DEVICE_TABLE(rtsx_pci_ids) = {
54 { PCI_DEVICE(0x10EC, 0x5209), PCI_CLASS_OTHERS << 16, 0xFF0000 },
55 { PCI_DEVICE(0x10EC, 0x5229), PCI_CLASS_OTHERS << 16, 0xFF0000 },
56 { PCI_DEVICE(0x10EC, 0x5289), PCI_CLASS_OTHERS << 16, 0xFF0000 },
57 { PCI_DEVICE(0x10EC, 0x5227), PCI_CLASS_OTHERS << 16, 0xFF0000 },
58 { PCI_DEVICE(0x10EC, 0x5249), PCI_CLASS_OTHERS << 16, 0xFF0000 },
59 { PCI_DEVICE(0x10EC, 0x5287), PCI_CLASS_OTHERS << 16, 0xFF0000 },
63 MODULE_DEVICE_TABLE(pci, rtsx_pci_ids);
65 void rtsx_pci_start_run(struct rtsx_pcr *pcr)
67 /* If pci device removed, don't queue idle work any more */
71 if (pcr->state != PDEV_STAT_RUN) {
72 pcr->state = PDEV_STAT_RUN;
73 if (pcr->ops->enable_auto_blink)
74 pcr->ops->enable_auto_blink(pcr);
77 rtsx_pci_write_config_byte(pcr, LCTLR, 0);
80 mod_delayed_work(system_wq, &pcr->idle_work, msecs_to_jiffies(200));
82 EXPORT_SYMBOL_GPL(rtsx_pci_start_run);
84 int rtsx_pci_write_register(struct rtsx_pcr *pcr, u16 addr, u8 mask, u8 data)
87 u32 val = HAIMR_WRITE_START;
89 val |= (u32)(addr & 0x3FFF) << 16;
90 val |= (u32)mask << 8;
93 rtsx_pci_writel(pcr, RTSX_HAIMR, val);
95 for (i = 0; i < MAX_RW_REG_CNT; i++) {
96 val = rtsx_pci_readl(pcr, RTSX_HAIMR);
97 if ((val & HAIMR_TRANS_END) == 0) {
106 EXPORT_SYMBOL_GPL(rtsx_pci_write_register);
108 int rtsx_pci_read_register(struct rtsx_pcr *pcr, u16 addr, u8 *data)
110 u32 val = HAIMR_READ_START;
113 val |= (u32)(addr & 0x3FFF) << 16;
114 rtsx_pci_writel(pcr, RTSX_HAIMR, val);
116 for (i = 0; i < MAX_RW_REG_CNT; i++) {
117 val = rtsx_pci_readl(pcr, RTSX_HAIMR);
118 if ((val & HAIMR_TRANS_END) == 0)
122 if (i >= MAX_RW_REG_CNT)
126 *data = (u8)(val & 0xFF);
130 EXPORT_SYMBOL_GPL(rtsx_pci_read_register);
132 int rtsx_pci_write_phy_register(struct rtsx_pcr *pcr, u8 addr, u16 val)
134 int err, i, finished = 0;
137 rtsx_pci_init_cmd(pcr);
139 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYDATA0, 0xFF, (u8)val);
140 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYDATA1, 0xFF, (u8)(val >> 8));
141 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYADDR, 0xFF, addr);
142 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYRWCTL, 0xFF, 0x81);
144 err = rtsx_pci_send_cmd(pcr, 100);
148 for (i = 0; i < 100000; i++) {
149 err = rtsx_pci_read_register(pcr, PHYRWCTL, &tmp);
164 EXPORT_SYMBOL_GPL(rtsx_pci_write_phy_register);
166 int rtsx_pci_read_phy_register(struct rtsx_pcr *pcr, u8 addr, u16 *val)
168 int err, i, finished = 0;
172 rtsx_pci_init_cmd(pcr);
174 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYADDR, 0xFF, addr);
175 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PHYRWCTL, 0xFF, 0x80);
177 err = rtsx_pci_send_cmd(pcr, 100);
181 for (i = 0; i < 100000; i++) {
182 err = rtsx_pci_read_register(pcr, PHYRWCTL, &tmp);
195 rtsx_pci_init_cmd(pcr);
197 rtsx_pci_add_cmd(pcr, READ_REG_CMD, PHYDATA0, 0, 0);
198 rtsx_pci_add_cmd(pcr, READ_REG_CMD, PHYDATA1, 0, 0);
200 err = rtsx_pci_send_cmd(pcr, 100);
204 ptr = rtsx_pci_get_cmd_data(pcr);
205 data = ((u16)ptr[1] << 8) | ptr[0];
212 EXPORT_SYMBOL_GPL(rtsx_pci_read_phy_register);
214 void rtsx_pci_stop_cmd(struct rtsx_pcr *pcr)
216 rtsx_pci_writel(pcr, RTSX_HCBCTLR, STOP_CMD);
217 rtsx_pci_writel(pcr, RTSX_HDBCTLR, STOP_DMA);
219 rtsx_pci_write_register(pcr, DMACTL, 0x80, 0x80);
220 rtsx_pci_write_register(pcr, RBCTL, 0x80, 0x80);
222 EXPORT_SYMBOL_GPL(rtsx_pci_stop_cmd);
224 void rtsx_pci_add_cmd(struct rtsx_pcr *pcr,
225 u8 cmd_type, u16 reg_addr, u8 mask, u8 data)
229 u32 *ptr = (u32 *)(pcr->host_cmds_ptr);
231 val |= (u32)(cmd_type & 0x03) << 30;
232 val |= (u32)(reg_addr & 0x3FFF) << 16;
233 val |= (u32)mask << 8;
236 spin_lock_irqsave(&pcr->lock, flags);
238 if (pcr->ci < (HOST_CMDS_BUF_LEN / 4)) {
239 put_unaligned_le32(val, ptr);
243 spin_unlock_irqrestore(&pcr->lock, flags);
245 EXPORT_SYMBOL_GPL(rtsx_pci_add_cmd);
247 void rtsx_pci_send_cmd_no_wait(struct rtsx_pcr *pcr)
251 rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
253 val |= (u32)(pcr->ci * 4) & 0x00FFFFFF;
254 /* Hardware Auto Response */
256 rtsx_pci_writel(pcr, RTSX_HCBCTLR, val);
258 EXPORT_SYMBOL_GPL(rtsx_pci_send_cmd_no_wait);
260 int rtsx_pci_send_cmd(struct rtsx_pcr *pcr, int timeout)
262 struct completion trans_done;
268 spin_lock_irqsave(&pcr->lock, flags);
270 /* set up data structures for the wakeup system */
271 pcr->done = &trans_done;
272 pcr->trans_result = TRANS_NOT_READY;
273 init_completion(&trans_done);
275 rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
277 val |= (u32)(pcr->ci * 4) & 0x00FFFFFF;
278 /* Hardware Auto Response */
280 rtsx_pci_writel(pcr, RTSX_HCBCTLR, val);
282 spin_unlock_irqrestore(&pcr->lock, flags);
284 /* Wait for TRANS_OK_INT */
285 timeleft = wait_for_completion_interruptible_timeout(
286 &trans_done, msecs_to_jiffies(timeout));
288 dev_dbg(&(pcr->pci->dev), "Timeout (%s %d)\n",
291 goto finish_send_cmd;
294 spin_lock_irqsave(&pcr->lock, flags);
295 if (pcr->trans_result == TRANS_RESULT_FAIL)
297 else if (pcr->trans_result == TRANS_RESULT_OK)
299 else if (pcr->trans_result == TRANS_NO_DEVICE)
301 spin_unlock_irqrestore(&pcr->lock, flags);
304 spin_lock_irqsave(&pcr->lock, flags);
306 spin_unlock_irqrestore(&pcr->lock, flags);
308 if ((err < 0) && (err != -ENODEV))
309 rtsx_pci_stop_cmd(pcr);
312 complete(pcr->finish_me);
316 EXPORT_SYMBOL_GPL(rtsx_pci_send_cmd);
318 static void rtsx_pci_add_sg_tbl(struct rtsx_pcr *pcr,
319 dma_addr_t addr, unsigned int len, int end)
321 u64 *ptr = (u64 *)(pcr->host_sg_tbl_ptr) + pcr->sgi;
323 u8 option = SG_VALID | SG_TRANS_DATA;
325 dev_dbg(&(pcr->pci->dev), "DMA addr: 0x%x, Len: 0x%x\n",
326 (unsigned int)addr, len);
330 val = ((u64)addr << 32) | ((u64)len << 12) | option;
332 put_unaligned_le64(val, ptr);
336 int rtsx_pci_transfer_data(struct rtsx_pcr *pcr, struct scatterlist *sglist,
337 int num_sg, bool read, int timeout)
339 struct completion trans_done;
341 int err = 0, i, count;
344 struct scatterlist *sg;
345 enum dma_data_direction dma_dir;
350 dev_dbg(&(pcr->pci->dev), "--> %s: num_sg = %d\n", __func__, num_sg);
352 /* don't transfer data during abort processing */
356 if ((sglist == NULL) || (num_sg <= 0))
360 dir = DEVICE_TO_HOST;
361 dma_dir = DMA_FROM_DEVICE;
363 dir = HOST_TO_DEVICE;
364 dma_dir = DMA_TO_DEVICE;
367 count = dma_map_sg(&(pcr->pci->dev), sglist, num_sg, dma_dir);
369 dev_err(&(pcr->pci->dev), "scatterlist map failed\n");
372 dev_dbg(&(pcr->pci->dev), "DMA mapping count: %d\n", count);
374 val = ((u32)(dir & 0x01) << 29) | TRIG_DMA | ADMA_MODE;
376 for_each_sg(sglist, sg, count, i) {
377 addr = sg_dma_address(sg);
378 len = sg_dma_len(sg);
379 rtsx_pci_add_sg_tbl(pcr, addr, len, i == count - 1);
382 spin_lock_irqsave(&pcr->lock, flags);
384 pcr->done = &trans_done;
385 pcr->trans_result = TRANS_NOT_READY;
386 init_completion(&trans_done);
387 rtsx_pci_writel(pcr, RTSX_HDBAR, pcr->host_sg_tbl_addr);
388 rtsx_pci_writel(pcr, RTSX_HDBCTLR, val);
390 spin_unlock_irqrestore(&pcr->lock, flags);
392 timeleft = wait_for_completion_interruptible_timeout(
393 &trans_done, msecs_to_jiffies(timeout));
395 dev_dbg(&(pcr->pci->dev), "Timeout (%s %d)\n",
401 spin_lock_irqsave(&pcr->lock, flags);
403 if (pcr->trans_result == TRANS_RESULT_FAIL)
405 else if (pcr->trans_result == TRANS_NO_DEVICE)
408 spin_unlock_irqrestore(&pcr->lock, flags);
411 spin_lock_irqsave(&pcr->lock, flags);
413 spin_unlock_irqrestore(&pcr->lock, flags);
415 dma_unmap_sg(&(pcr->pci->dev), sglist, num_sg, dma_dir);
417 if ((err < 0) && (err != -ENODEV))
418 rtsx_pci_stop_cmd(pcr);
421 complete(pcr->finish_me);
425 EXPORT_SYMBOL_GPL(rtsx_pci_transfer_data);
427 int rtsx_pci_read_ppbuf(struct rtsx_pcr *pcr, u8 *buf, int buf_len)
439 for (i = 0; i < buf_len / 256; i++) {
440 rtsx_pci_init_cmd(pcr);
442 for (j = 0; j < 256; j++)
443 rtsx_pci_add_cmd(pcr, READ_REG_CMD, reg++, 0, 0);
445 err = rtsx_pci_send_cmd(pcr, 250);
449 memcpy(ptr, rtsx_pci_get_cmd_data(pcr), 256);
454 rtsx_pci_init_cmd(pcr);
456 for (j = 0; j < buf_len % 256; j++)
457 rtsx_pci_add_cmd(pcr, READ_REG_CMD, reg++, 0, 0);
459 err = rtsx_pci_send_cmd(pcr, 250);
464 memcpy(ptr, rtsx_pci_get_cmd_data(pcr), buf_len % 256);
468 EXPORT_SYMBOL_GPL(rtsx_pci_read_ppbuf);
470 int rtsx_pci_write_ppbuf(struct rtsx_pcr *pcr, u8 *buf, int buf_len)
482 for (i = 0; i < buf_len / 256; i++) {
483 rtsx_pci_init_cmd(pcr);
485 for (j = 0; j < 256; j++) {
486 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
491 err = rtsx_pci_send_cmd(pcr, 250);
497 rtsx_pci_init_cmd(pcr);
499 for (j = 0; j < buf_len % 256; j++) {
500 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
505 err = rtsx_pci_send_cmd(pcr, 250);
512 EXPORT_SYMBOL_GPL(rtsx_pci_write_ppbuf);
514 static int rtsx_pci_set_pull_ctl(struct rtsx_pcr *pcr, const u32 *tbl)
518 rtsx_pci_init_cmd(pcr);
520 while (*tbl & 0xFFFF0000) {
521 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
522 (u16)(*tbl >> 16), 0xFF, (u8)(*tbl));
526 err = rtsx_pci_send_cmd(pcr, 100);
533 int rtsx_pci_card_pull_ctl_enable(struct rtsx_pcr *pcr, int card)
537 if (card == RTSX_SD_CARD)
538 tbl = pcr->sd_pull_ctl_enable_tbl;
539 else if (card == RTSX_MS_CARD)
540 tbl = pcr->ms_pull_ctl_enable_tbl;
544 return rtsx_pci_set_pull_ctl(pcr, tbl);
546 EXPORT_SYMBOL_GPL(rtsx_pci_card_pull_ctl_enable);
548 int rtsx_pci_card_pull_ctl_disable(struct rtsx_pcr *pcr, int card)
552 if (card == RTSX_SD_CARD)
553 tbl = pcr->sd_pull_ctl_disable_tbl;
554 else if (card == RTSX_MS_CARD)
555 tbl = pcr->ms_pull_ctl_disable_tbl;
560 return rtsx_pci_set_pull_ctl(pcr, tbl);
562 EXPORT_SYMBOL_GPL(rtsx_pci_card_pull_ctl_disable);
564 static void rtsx_pci_enable_bus_int(struct rtsx_pcr *pcr)
566 pcr->bier = TRANS_OK_INT_EN | TRANS_FAIL_INT_EN | SD_INT_EN;
568 if (pcr->num_slots > 1)
569 pcr->bier |= MS_INT_EN;
571 /* Enable Bus Interrupt */
572 rtsx_pci_writel(pcr, RTSX_BIER, pcr->bier);
574 dev_dbg(&(pcr->pci->dev), "RTSX_BIER: 0x%08x\n", pcr->bier);
577 static inline u8 double_ssc_depth(u8 depth)
579 return ((depth > 1) ? (depth - 1) : depth);
582 static u8 revise_ssc_depth(u8 ssc_depth, u8 div)
584 if (div > CLK_DIV_1) {
585 if (ssc_depth > (div - 1))
586 ssc_depth -= (div - 1);
588 ssc_depth = SSC_DEPTH_4M;
594 int rtsx_pci_switch_clock(struct rtsx_pcr *pcr, unsigned int card_clock,
595 u8 ssc_depth, bool initial_mode, bool double_clk, bool vpclk)
598 u8 n, clk_divider, mcu_cnt, div;
600 [RTSX_SSC_DEPTH_4M] = SSC_DEPTH_4M,
601 [RTSX_SSC_DEPTH_2M] = SSC_DEPTH_2M,
602 [RTSX_SSC_DEPTH_1M] = SSC_DEPTH_1M,
603 [RTSX_SSC_DEPTH_500K] = SSC_DEPTH_500K,
604 [RTSX_SSC_DEPTH_250K] = SSC_DEPTH_250K,
608 /* We use 250k(around) here, in initial stage */
609 clk_divider = SD_CLK_DIVIDE_128;
610 card_clock = 30000000;
612 clk_divider = SD_CLK_DIVIDE_0;
614 err = rtsx_pci_write_register(pcr, SD_CFG1,
615 SD_CLK_DIVIDE_MASK, clk_divider);
619 card_clock /= 1000000;
620 dev_dbg(&(pcr->pci->dev), "Switch card clock to %dMHz\n", card_clock);
623 if (!initial_mode && double_clk)
624 clk = card_clock * 2;
625 dev_dbg(&(pcr->pci->dev),
626 "Internal SSC clock: %dMHz (cur_clock = %d)\n",
627 clk, pcr->cur_clock);
629 if (clk == pcr->cur_clock)
632 if (pcr->ops->conv_clk_and_div_n)
633 n = (u8)pcr->ops->conv_clk_and_div_n(clk, CLK_TO_DIV_N);
636 if ((clk <= 2) || (n > MAX_DIV_N_PCR))
639 mcu_cnt = (u8)(125/clk + 3);
643 /* Make sure that the SSC clock div_n is not less than MIN_DIV_N_PCR */
645 while ((n < MIN_DIV_N_PCR) && (div < CLK_DIV_8)) {
646 if (pcr->ops->conv_clk_and_div_n) {
647 int dbl_clk = pcr->ops->conv_clk_and_div_n(n,
649 n = (u8)pcr->ops->conv_clk_and_div_n(dbl_clk,
656 dev_dbg(&(pcr->pci->dev), "n = %d, div = %d\n", n, div);
658 ssc_depth = depth[ssc_depth];
660 ssc_depth = double_ssc_depth(ssc_depth);
662 ssc_depth = revise_ssc_depth(ssc_depth, div);
663 dev_dbg(&(pcr->pci->dev), "ssc_depth = %d\n", ssc_depth);
665 rtsx_pci_init_cmd(pcr);
666 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
667 CLK_LOW_FREQ, CLK_LOW_FREQ);
668 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_DIV,
669 0xFF, (div << 4) | mcu_cnt);
670 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, 0);
671 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL2,
672 SSC_DEPTH_MASK, ssc_depth);
673 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_DIV_N_0, 0xFF, n);
674 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, SSC_RSTB);
676 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
678 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
679 PHASE_NOT_RESET, PHASE_NOT_RESET);
682 err = rtsx_pci_send_cmd(pcr, 2000);
686 /* Wait SSC clock stable */
688 err = rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, 0);
692 pcr->cur_clock = clk;
695 EXPORT_SYMBOL_GPL(rtsx_pci_switch_clock);
697 int rtsx_pci_card_power_on(struct rtsx_pcr *pcr, int card)
699 if (pcr->ops->card_power_on)
700 return pcr->ops->card_power_on(pcr, card);
704 EXPORT_SYMBOL_GPL(rtsx_pci_card_power_on);
706 int rtsx_pci_card_power_off(struct rtsx_pcr *pcr, int card)
708 if (pcr->ops->card_power_off)
709 return pcr->ops->card_power_off(pcr, card);
713 EXPORT_SYMBOL_GPL(rtsx_pci_card_power_off);
715 int rtsx_pci_card_exclusive_check(struct rtsx_pcr *pcr, int card)
717 unsigned int cd_mask[] = {
718 [RTSX_SD_CARD] = SD_EXIST,
719 [RTSX_MS_CARD] = MS_EXIST
722 if (!(pcr->flags & PCR_MS_PMOS)) {
723 /* When using single PMOS, accessing card is not permitted
724 * if the existing card is not the designated one.
726 if (pcr->card_exist & (~cd_mask[card]))
732 EXPORT_SYMBOL_GPL(rtsx_pci_card_exclusive_check);
734 int rtsx_pci_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
736 if (pcr->ops->switch_output_voltage)
737 return pcr->ops->switch_output_voltage(pcr, voltage);
741 EXPORT_SYMBOL_GPL(rtsx_pci_switch_output_voltage);
743 unsigned int rtsx_pci_card_exist(struct rtsx_pcr *pcr)
747 val = rtsx_pci_readl(pcr, RTSX_BIPR);
748 if (pcr->ops->cd_deglitch)
749 val = pcr->ops->cd_deglitch(pcr);
753 EXPORT_SYMBOL_GPL(rtsx_pci_card_exist);
755 void rtsx_pci_complete_unfinished_transfer(struct rtsx_pcr *pcr)
757 struct completion finish;
759 pcr->finish_me = &finish;
760 init_completion(&finish);
765 if (!pcr->remove_pci)
766 rtsx_pci_stop_cmd(pcr);
768 wait_for_completion_interruptible_timeout(&finish,
769 msecs_to_jiffies(2));
770 pcr->finish_me = NULL;
772 EXPORT_SYMBOL_GPL(rtsx_pci_complete_unfinished_transfer);
774 static void rtsx_pci_card_detect(struct work_struct *work)
776 struct delayed_work *dwork;
777 struct rtsx_pcr *pcr;
779 unsigned int card_detect = 0, card_inserted, card_removed;
782 dwork = to_delayed_work(work);
783 pcr = container_of(dwork, struct rtsx_pcr, carddet_work);
785 dev_dbg(&(pcr->pci->dev), "--> %s\n", __func__);
787 mutex_lock(&pcr->pcr_mutex);
788 spin_lock_irqsave(&pcr->lock, flags);
790 irq_status = rtsx_pci_readl(pcr, RTSX_BIPR);
791 dev_dbg(&(pcr->pci->dev), "irq_status: 0x%08x\n", irq_status);
793 irq_status &= CARD_EXIST;
794 card_inserted = pcr->card_inserted & irq_status;
795 card_removed = pcr->card_removed;
796 pcr->card_inserted = 0;
797 pcr->card_removed = 0;
799 spin_unlock_irqrestore(&pcr->lock, flags);
801 if (card_inserted || card_removed) {
802 dev_dbg(&(pcr->pci->dev),
803 "card_inserted: 0x%x, card_removed: 0x%x\n",
804 card_inserted, card_removed);
806 if (pcr->ops->cd_deglitch)
807 card_inserted = pcr->ops->cd_deglitch(pcr);
809 card_detect = card_inserted | card_removed;
811 pcr->card_exist |= card_inserted;
812 pcr->card_exist &= ~card_removed;
815 mutex_unlock(&pcr->pcr_mutex);
817 if ((card_detect & SD_EXIST) && pcr->slots[RTSX_SD_CARD].card_event)
818 pcr->slots[RTSX_SD_CARD].card_event(
819 pcr->slots[RTSX_SD_CARD].p_dev);
820 if ((card_detect & MS_EXIST) && pcr->slots[RTSX_MS_CARD].card_event)
821 pcr->slots[RTSX_MS_CARD].card_event(
822 pcr->slots[RTSX_MS_CARD].p_dev);
825 static irqreturn_t rtsx_pci_isr(int irq, void *dev_id)
827 struct rtsx_pcr *pcr = dev_id;
833 spin_lock(&pcr->lock);
835 int_reg = rtsx_pci_readl(pcr, RTSX_BIPR);
836 /* Clear interrupt flag */
837 rtsx_pci_writel(pcr, RTSX_BIPR, int_reg);
838 if ((int_reg & pcr->bier) == 0) {
839 spin_unlock(&pcr->lock);
842 if (int_reg == 0xFFFFFFFF) {
843 spin_unlock(&pcr->lock);
847 int_reg &= (pcr->bier | 0x7FFFFF);
849 if (int_reg & SD_INT) {
850 if (int_reg & SD_EXIST) {
851 pcr->card_inserted |= SD_EXIST;
853 pcr->card_removed |= SD_EXIST;
854 pcr->card_inserted &= ~SD_EXIST;
858 if (int_reg & MS_INT) {
859 if (int_reg & MS_EXIST) {
860 pcr->card_inserted |= MS_EXIST;
862 pcr->card_removed |= MS_EXIST;
863 pcr->card_inserted &= ~MS_EXIST;
867 if (int_reg & (NEED_COMPLETE_INT | DELINK_INT)) {
868 if (int_reg & (TRANS_FAIL_INT | DELINK_INT)) {
869 pcr->trans_result = TRANS_RESULT_FAIL;
872 } else if (int_reg & TRANS_OK_INT) {
873 pcr->trans_result = TRANS_RESULT_OK;
879 if (pcr->card_inserted || pcr->card_removed)
880 schedule_delayed_work(&pcr->carddet_work,
881 msecs_to_jiffies(200));
883 spin_unlock(&pcr->lock);
887 static int rtsx_pci_acquire_irq(struct rtsx_pcr *pcr)
889 dev_info(&(pcr->pci->dev), "%s: pcr->msi_en = %d, pci->irq = %d\n",
890 __func__, pcr->msi_en, pcr->pci->irq);
892 if (request_irq(pcr->pci->irq, rtsx_pci_isr,
893 pcr->msi_en ? 0 : IRQF_SHARED,
894 DRV_NAME_RTSX_PCI, pcr)) {
895 dev_err(&(pcr->pci->dev),
896 "rtsx_sdmmc: unable to grab IRQ %d, disabling device\n",
901 pcr->irq = pcr->pci->irq;
902 pci_intx(pcr->pci, !pcr->msi_en);
907 static void rtsx_pci_idle_work(struct work_struct *work)
909 struct delayed_work *dwork = to_delayed_work(work);
910 struct rtsx_pcr *pcr = container_of(dwork, struct rtsx_pcr, idle_work);
912 dev_dbg(&(pcr->pci->dev), "--> %s\n", __func__);
914 mutex_lock(&pcr->pcr_mutex);
916 pcr->state = PDEV_STAT_IDLE;
918 if (pcr->ops->disable_auto_blink)
919 pcr->ops->disable_auto_blink(pcr);
920 if (pcr->ops->turn_off_led)
921 pcr->ops->turn_off_led(pcr);
924 rtsx_pci_write_config_byte(pcr, LCTLR, pcr->aspm_en);
926 mutex_unlock(&pcr->pcr_mutex);
929 static void rtsx_pci_power_off(struct rtsx_pcr *pcr, u8 pm_state)
931 if (pcr->ops->turn_off_led)
932 pcr->ops->turn_off_led(pcr);
934 rtsx_pci_writel(pcr, RTSX_BIER, 0);
937 rtsx_pci_write_register(pcr, PETXCFG, 0x08, 0x08);
938 rtsx_pci_write_register(pcr, HOST_SLEEP_STATE, 0x03, pm_state);
940 if (pcr->ops->force_power_down)
941 pcr->ops->force_power_down(pcr, pm_state);
944 static int rtsx_pci_init_hw(struct rtsx_pcr *pcr)
948 rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
950 rtsx_pci_enable_bus_int(pcr);
953 err = rtsx_pci_write_register(pcr, FPDCTL, SSC_POWER_DOWN, 0);
957 /* Wait SSC power stable */
960 if (pcr->ops->optimize_phy) {
961 err = pcr->ops->optimize_phy(pcr);
966 rtsx_pci_init_cmd(pcr);
968 /* Set mcu_cnt to 7 to ensure data can be sampled properly */
969 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_DIV, 0x07, 0x07);
971 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, HOST_SLEEP_STATE, 0x03, 0x00);
972 /* Disable card clock */
973 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_CLK_EN, 0x1E, 0);
974 /* Reset delink mode */
975 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CHANGE_LINK_STATE, 0x0A, 0);
976 /* Card driving select */
977 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DRIVE_SEL,
978 0xFF, pcr->card_drive_sel);
979 /* Enable SSC Clock */
980 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1,
981 0xFF, SSC_8X_EN | SSC_SEL_4M);
982 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL2, 0xFF, 0x12);
983 /* Disable cd_pwr_save */
984 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CHANGE_LINK_STATE, 0x16, 0x10);
985 /* Clear Link Ready Interrupt */
986 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, IRQSTAT0,
987 LINK_RDY_INT, LINK_RDY_INT);
988 /* Enlarge the estimation window of PERST# glitch
989 * to reduce the chance of invalid card interrupt
991 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PERST_GLITCH_WIDTH, 0xFF, 0x80);
992 /* Update RC oscillator to 400k
993 * bit[0] F_HIGH: for RC oscillator, Rst_value is 1'b1
996 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, RCCTL, 0x01, 0x00);
997 /* Set interrupt write clear
998 * bit 1: U_elbi_if_rd_clr_en
999 * 1: Enable ELBI interrupt[31:22] & [7:0] flag read clear
1000 * 0: ELBI interrupt flag[31:22] & [7:0] only can be write clear
1002 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, NFTS_TX_CTRL, 0x02, 0);
1004 err = rtsx_pci_send_cmd(pcr, 100);
1008 rtsx_pci_write_config_byte(pcr, LCTLR, 0);
1010 /* Enable clk_request_n to enable clock power management */
1011 rtsx_pci_write_config_byte(pcr, 0x81, 1);
1012 /* Enter L1 when host tx idle */
1013 rtsx_pci_write_config_byte(pcr, 0x70F, 0x5B);
1015 if (pcr->ops->extra_init_hw) {
1016 err = pcr->ops->extra_init_hw(pcr);
1021 /* No CD interrupt if probing driver with card inserted.
1022 * So we need to initialize pcr->card_exist here.
1024 if (pcr->ops->cd_deglitch)
1025 pcr->card_exist = pcr->ops->cd_deglitch(pcr);
1027 pcr->card_exist = rtsx_pci_readl(pcr, RTSX_BIPR) & CARD_EXIST;
1032 static int rtsx_pci_init_chip(struct rtsx_pcr *pcr)
1036 spin_lock_init(&pcr->lock);
1037 mutex_init(&pcr->pcr_mutex);
1039 switch (PCI_PID(pcr)) {
1042 rts5209_init_params(pcr);
1046 rts5229_init_params(pcr);
1050 rtl8411_init_params(pcr);
1054 rts5227_init_params(pcr);
1058 rts5249_init_params(pcr);
1062 rtl8411b_init_params(pcr);
1066 dev_dbg(&(pcr->pci->dev), "PID: 0x%04x, IC version: 0x%02x\n",
1067 PCI_PID(pcr), pcr->ic_version);
1069 pcr->slots = kcalloc(pcr->num_slots, sizeof(struct rtsx_slot),
1074 if (pcr->ops->fetch_vendor_settings)
1075 pcr->ops->fetch_vendor_settings(pcr);
1077 dev_dbg(&(pcr->pci->dev), "pcr->aspm_en = 0x%x\n", pcr->aspm_en);
1078 dev_dbg(&(pcr->pci->dev), "pcr->sd30_drive_sel_1v8 = 0x%x\n",
1079 pcr->sd30_drive_sel_1v8);
1080 dev_dbg(&(pcr->pci->dev), "pcr->sd30_drive_sel_3v3 = 0x%x\n",
1081 pcr->sd30_drive_sel_3v3);
1082 dev_dbg(&(pcr->pci->dev), "pcr->card_drive_sel = 0x%x\n",
1083 pcr->card_drive_sel);
1084 dev_dbg(&(pcr->pci->dev), "pcr->flags = 0x%x\n", pcr->flags);
1086 pcr->state = PDEV_STAT_IDLE;
1087 err = rtsx_pci_init_hw(pcr);
1096 static int rtsx_pci_probe(struct pci_dev *pcidev,
1097 const struct pci_device_id *id)
1099 struct rtsx_pcr *pcr;
1100 struct pcr_handle *handle;
1104 dev_dbg(&(pcidev->dev),
1105 ": Realtek PCI-E Card Reader found at %s [%04x:%04x] (rev %x)\n",
1106 pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device,
1107 (int)pcidev->revision);
1109 ret = pci_set_dma_mask(pcidev, DMA_BIT_MASK(32));
1113 ret = pci_enable_device(pcidev);
1117 ret = pci_request_regions(pcidev, DRV_NAME_RTSX_PCI);
1121 pcr = kzalloc(sizeof(*pcr), GFP_KERNEL);
1127 handle = kzalloc(sizeof(*handle), GFP_KERNEL);
1134 idr_preload(GFP_KERNEL);
1135 spin_lock(&rtsx_pci_lock);
1136 ret = idr_alloc(&rtsx_pci_idr, pcr, 0, 0, GFP_NOWAIT);
1139 spin_unlock(&rtsx_pci_lock);
1145 dev_set_drvdata(&pcidev->dev, handle);
1147 len = pci_resource_len(pcidev, 0);
1148 base = pci_resource_start(pcidev, 0);
1149 pcr->remap_addr = ioremap_nocache(base, len);
1150 if (!pcr->remap_addr) {
1155 pcr->rtsx_resv_buf = dma_alloc_coherent(&(pcidev->dev),
1156 RTSX_RESV_BUF_LEN, &(pcr->rtsx_resv_buf_addr),
1158 if (pcr->rtsx_resv_buf == NULL) {
1162 pcr->host_cmds_ptr = pcr->rtsx_resv_buf;
1163 pcr->host_cmds_addr = pcr->rtsx_resv_buf_addr;
1164 pcr->host_sg_tbl_ptr = pcr->rtsx_resv_buf + HOST_CMDS_BUF_LEN;
1165 pcr->host_sg_tbl_addr = pcr->rtsx_resv_buf_addr + HOST_CMDS_BUF_LEN;
1167 pcr->card_inserted = 0;
1168 pcr->card_removed = 0;
1169 INIT_DELAYED_WORK(&pcr->carddet_work, rtsx_pci_card_detect);
1170 INIT_DELAYED_WORK(&pcr->idle_work, rtsx_pci_idle_work);
1172 pcr->msi_en = msi_en;
1174 ret = pci_enable_msi(pcidev);
1176 pcr->msi_en = false;
1179 ret = rtsx_pci_acquire_irq(pcr);
1183 pci_set_master(pcidev);
1184 synchronize_irq(pcr->irq);
1186 ret = rtsx_pci_init_chip(pcr);
1190 for (i = 0; i < ARRAY_SIZE(rtsx_pcr_cells); i++) {
1191 rtsx_pcr_cells[i].platform_data = handle;
1192 rtsx_pcr_cells[i].pdata_size = sizeof(*handle);
1194 ret = mfd_add_devices(&pcidev->dev, pcr->id, rtsx_pcr_cells,
1195 ARRAY_SIZE(rtsx_pcr_cells), NULL, 0, NULL);
1199 schedule_delayed_work(&pcr->idle_work, msecs_to_jiffies(200));
1204 free_irq(pcr->irq, (void *)pcr);
1207 pci_disable_msi(pcr->pci);
1208 dma_free_coherent(&(pcr->pci->dev), RTSX_RESV_BUF_LEN,
1209 pcr->rtsx_resv_buf, pcr->rtsx_resv_buf_addr);
1211 iounmap(pcr->remap_addr);
1213 dev_set_drvdata(&pcidev->dev, NULL);
1219 pci_release_regions(pcidev);
1221 pci_disable_device(pcidev);
1226 static void rtsx_pci_remove(struct pci_dev *pcidev)
1228 struct pcr_handle *handle = pci_get_drvdata(pcidev);
1229 struct rtsx_pcr *pcr = handle->pcr;
1231 pcr->remove_pci = true;
1233 cancel_delayed_work(&pcr->carddet_work);
1234 cancel_delayed_work(&pcr->idle_work);
1236 mfd_remove_devices(&pcidev->dev);
1238 dma_free_coherent(&(pcr->pci->dev), RTSX_RESV_BUF_LEN,
1239 pcr->rtsx_resv_buf, pcr->rtsx_resv_buf_addr);
1240 free_irq(pcr->irq, (void *)pcr);
1242 pci_disable_msi(pcr->pci);
1243 iounmap(pcr->remap_addr);
1245 dev_set_drvdata(&pcidev->dev, NULL);
1246 pci_release_regions(pcidev);
1247 pci_disable_device(pcidev);
1249 spin_lock(&rtsx_pci_lock);
1250 idr_remove(&rtsx_pci_idr, pcr->id);
1251 spin_unlock(&rtsx_pci_lock);
1257 dev_dbg(&(pcidev->dev),
1258 ": Realtek PCI-E Card Reader at %s [%04x:%04x] has been removed\n",
1259 pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device);
1264 static int rtsx_pci_suspend(struct pci_dev *pcidev, pm_message_t state)
1266 struct pcr_handle *handle;
1267 struct rtsx_pcr *pcr;
1269 dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
1271 handle = pci_get_drvdata(pcidev);
1274 cancel_delayed_work(&pcr->carddet_work);
1275 cancel_delayed_work(&pcr->idle_work);
1277 mutex_lock(&pcr->pcr_mutex);
1279 rtsx_pci_power_off(pcr, HOST_ENTER_S3);
1281 pci_save_state(pcidev);
1282 pci_enable_wake(pcidev, pci_choose_state(pcidev, state), 0);
1283 pci_disable_device(pcidev);
1284 pci_set_power_state(pcidev, pci_choose_state(pcidev, state));
1286 mutex_unlock(&pcr->pcr_mutex);
1290 static int rtsx_pci_resume(struct pci_dev *pcidev)
1292 struct pcr_handle *handle;
1293 struct rtsx_pcr *pcr;
1296 dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
1298 handle = pci_get_drvdata(pcidev);
1301 mutex_lock(&pcr->pcr_mutex);
1303 pci_set_power_state(pcidev, PCI_D0);
1304 pci_restore_state(pcidev);
1305 ret = pci_enable_device(pcidev);
1308 pci_set_master(pcidev);
1310 ret = rtsx_pci_write_register(pcr, HOST_SLEEP_STATE, 0x03, 0x00);
1314 ret = rtsx_pci_init_hw(pcr);
1318 schedule_delayed_work(&pcr->idle_work, msecs_to_jiffies(200));
1321 mutex_unlock(&pcr->pcr_mutex);
1325 static void rtsx_pci_shutdown(struct pci_dev *pcidev)
1327 struct pcr_handle *handle;
1328 struct rtsx_pcr *pcr;
1330 dev_dbg(&(pcidev->dev), "--> %s\n", __func__);
1332 handle = pci_get_drvdata(pcidev);
1334 rtsx_pci_power_off(pcr, HOST_ENTER_S1);
1336 pci_disable_device(pcidev);
1339 #else /* CONFIG_PM */
1341 #define rtsx_pci_suspend NULL
1342 #define rtsx_pci_resume NULL
1343 #define rtsx_pci_shutdown NULL
1345 #endif /* CONFIG_PM */
1347 static struct pci_driver rtsx_pci_driver = {
1348 .name = DRV_NAME_RTSX_PCI,
1349 .id_table = rtsx_pci_ids,
1350 .probe = rtsx_pci_probe,
1351 .remove = rtsx_pci_remove,
1352 .suspend = rtsx_pci_suspend,
1353 .resume = rtsx_pci_resume,
1354 .shutdown = rtsx_pci_shutdown,
1356 module_pci_driver(rtsx_pci_driver);
1358 MODULE_LICENSE("GPL");
1359 MODULE_AUTHOR("Wei WANG <wei_wang@realsil.com.cn>");
1360 MODULE_DESCRIPTION("Realtek PCI-E Card Reader Driver");