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-rw-r--r--Documentation/arm/SH-Mobile/zboot-rom-sdhi.txt42
-rw-r--r--arch/arm/Kconfig33
-rw-r--r--arch/arm/boot/compressed/Makefile10
-rw-r--r--arch/arm/boot/compressed/head-shmobile.S12
-rw-r--r--arch/arm/boot/compressed/mmcif-sh7372.c2
-rw-r--r--arch/arm/boot/compressed/sdhi-sh7372.c95
-rw-r--r--arch/arm/boot/compressed/sdhi-shmobile.c449
-rw-r--r--arch/arm/boot/compressed/sdhi-shmobile.h11
-rw-r--r--arch/arm/mach-shmobile/include/mach/sdhi-sh7372.h21
-rw-r--r--arch/arm/mach-shmobile/include/mach/sdhi.h16
10 files changed, 674 insertions, 17 deletions
diff --git a/Documentation/arm/SH-Mobile/zboot-rom-sdhi.txt b/Documentation/arm/SH-Mobile/zboot-rom-sdhi.txt
new file mode 100644
index 000000000000..441959846e1a
--- /dev/null
+++ b/Documentation/arm/SH-Mobile/zboot-rom-sdhi.txt
@@ -0,0 +1,42 @@
1ROM-able zImage boot from eSD
2-----------------------------
3
4An ROM-able zImage compiled with ZBOOT_ROM_SDHI may be written to eSD and
5SuperH Mobile ARM will to boot directly from the SDHI hardware block.
6
7This is achieved by the mask ROM loading the first portion of the image into
8MERAM and then jumping to it. This portion contains loader code which
9copies the entire image to SDRAM and jumps to it. From there the zImage
10boot code proceeds as normal, uncompressing the image into its final
11location and then jumping to it.
12
13This code has been tested on an mackerel board using the developer 1A eSD
14boot mode which is configured using the following jumper settings.
15
16 8 7 6 5 4 3 2 1
17 x|x|x|x| |x|x|
18S4 -+-+-+-+-+-+-+-
19 | | | |x| | |x on
20
21The eSD card needs to be present in SDHI slot 1 (CN7).
22As such S1 and S33 also need to be configured as per
23the notes in arch/arm/mach-shmobile/board-mackerel.c.
24
25A partial zImage must be written to physical partition #1 (boot)
26of the eSD at sector 0 in vrl4 format. A utility vrl4 is supplied to
27accomplish this.
28
29e.g.
30 vrl4 < zImage | dd of=/dev/sdX bs=512 count=17
31
32A full copy of _the same_ zImage should be written to physical partition #1
33(boot) of the eSD at sector 0. This should _not_ be in vrl4 format.
34
35 vrl4 < zImage | dd of=/dev/sdX bs=512
36
37Note: The commands above assume that the physical partition has been
38switched. No such facility currently exists in the Linux Kernel.
39
40Physical partitions are described in the eSD specification. At the time of
41writing they are not the same as partitions that are typically configured
42using fdisk and visible through /proc/partitions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index cc0dcbf1f6b5..cd8f520dd03d 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1718,17 +1718,34 @@ config ZBOOT_ROM
1718 Say Y here if you intend to execute your compressed kernel image 1718 Say Y here if you intend to execute your compressed kernel image
1719 (zImage) directly from ROM or flash. If unsure, say N. 1719 (zImage) directly from ROM or flash. If unsure, say N.
1720 1720
1721choice
1722 prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
1723 depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
1724 default ZBOOT_ROM_NONE
1725 help
1726 Include experimental SD/MMC loading code in the ROM-able zImage.
1727 With this enabled it is possible to write the the ROM-able zImage
1728 kernel image to an MMC or SD card and boot the kernel straight
1729 from the reset vector. At reset the processor Mask ROM will load
1730 the first part of the the ROM-able zImage which in turn loads the
1731 rest the kernel image to RAM.
1732
1733config ZBOOT_ROM_NONE
1734 bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
1735 help
1736 Do not load image from SD or MMC
1737
1721config ZBOOT_ROM_MMCIF 1738config ZBOOT_ROM_MMCIF
1722 bool "Include MMCIF loader in zImage (EXPERIMENTAL)" 1739 bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
1723 depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
1724 help 1740 help
1725 Say Y here to include experimental MMCIF loading code in the 1741 Load image from MMCIF hardware block.
1726 ROM-able zImage. With this enabled it is possible to write the 1742
1727 the ROM-able zImage kernel image to an MMC card and boot the 1743config ZBOOT_ROM_SH_MOBILE_SDHI
1728 kernel straight from the reset vector. At reset the processor 1744 bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
1729 Mask ROM will load the first part of the the ROM-able zImage 1745 help
1730 which in turn loads the rest the kernel image to RAM using the 1746 Load image from SDHI hardware block
1731 MMCIF hardware block. 1747
1748endchoice
1732 1749
1733config CMDLINE 1750config CMDLINE
1734 string "Default kernel command string" 1751 string "Default kernel command string"
diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile
index 23aad0722303..0c74a6fab952 100644
--- a/arch/arm/boot/compressed/Makefile
+++ b/arch/arm/boot/compressed/Makefile
@@ -6,13 +6,19 @@
6 6
7OBJS = 7OBJS =
8 8
9# Ensure that mmcif loader code appears early in the image 9# Ensure that MMCIF loader code appears early in the image
10# to minimise that number of bocks that have to be read in 10# to minimise that number of bocks that have to be read in
11# order to load it. 11# order to load it.
12ifeq ($(CONFIG_ZBOOT_ROM_MMCIF),y) 12ifeq ($(CONFIG_ZBOOT_ROM_MMCIF),y)
13ifeq ($(CONFIG_ARCH_SH7372),y)
14OBJS += mmcif-sh7372.o 13OBJS += mmcif-sh7372.o
15endif 14endif
15
16# Ensure that SDHI loader code appears early in the image
17# to minimise that number of bocks that have to be read in
18# order to load it.
19ifeq ($(CONFIG_ZBOOT_ROM_SH_MOBILE_SDHI),y)
20OBJS += sdhi-shmobile.o
21OBJS += sdhi-sh7372.o
16endif 22endif
17 23
18AFLAGS_head.o += -DTEXT_OFFSET=$(TEXT_OFFSET) 24AFLAGS_head.o += -DTEXT_OFFSET=$(TEXT_OFFSET)
diff --git a/arch/arm/boot/compressed/head-shmobile.S b/arch/arm/boot/compressed/head-shmobile.S
index c943d2e7da9d..fe3719b516fd 100644
--- a/arch/arm/boot/compressed/head-shmobile.S
+++ b/arch/arm/boot/compressed/head-shmobile.S
@@ -25,14 +25,14 @@
25 /* load board-specific initialization code */ 25 /* load board-specific initialization code */
26#include <mach/zboot.h> 26#include <mach/zboot.h>
27 27
28#ifdef CONFIG_ZBOOT_ROM_MMCIF 28#if defined(CONFIG_ZBOOT_ROM_MMCIF) || defined(CONFIG_ZBOOT_ROM_SH_MOBILE_SDHI)
29 /* Load image from MMC */ 29 /* Load image from MMC/SD */
30 adr sp, __tmp_stack + 128 30 adr sp, __tmp_stack + 256
31 ldr r0, __image_start 31 ldr r0, __image_start
32 ldr r1, __image_end 32 ldr r1, __image_end
33 subs r1, r1, r0 33 subs r1, r1, r0
34 ldr r0, __load_base 34 ldr r0, __load_base
35 bl mmcif_loader 35 bl mmc_loader
36 36
37 /* Jump to loaded code */ 37 /* Jump to loaded code */
38 ldr r0, __loaded 38 ldr r0, __loaded
@@ -51,9 +51,9 @@ __loaded:
51 .long __continue 51 .long __continue
52 .align 52 .align
53__tmp_stack: 53__tmp_stack:
54 .space 128 54 .space 256
55__continue: 55__continue:
56#endif /* CONFIG_ZBOOT_ROM_MMCIF */ 56#endif /* CONFIG_ZBOOT_ROM_MMC || CONFIG_ZBOOT_ROM_SH_MOBILE_SDHI */
57 57
58 b 1f 58 b 1f
59__atags:@ tag #1 59__atags:@ tag #1
diff --git a/arch/arm/boot/compressed/mmcif-sh7372.c b/arch/arm/boot/compressed/mmcif-sh7372.c
index 7453c8337b83..b6f61d9a5a1b 100644
--- a/arch/arm/boot/compressed/mmcif-sh7372.c
+++ b/arch/arm/boot/compressed/mmcif-sh7372.c
@@ -40,7 +40,7 @@
40 * to an MMC card 40 * to an MMC card
41 * # dd if=vrl4.out of=/dev/sdx bs=512 seek=1 41 * # dd if=vrl4.out of=/dev/sdx bs=512 seek=1
42 */ 42 */
43asmlinkage void mmcif_loader(unsigned char *buf, unsigned long len) 43asmlinkage void mmc_loader(unsigned char *buf, unsigned long len)
44{ 44{
45 mmc_init_progress(); 45 mmc_init_progress();
46 mmc_update_progress(MMC_PROGRESS_ENTER); 46 mmc_update_progress(MMC_PROGRESS_ENTER);
diff --git a/arch/arm/boot/compressed/sdhi-sh7372.c b/arch/arm/boot/compressed/sdhi-sh7372.c
new file mode 100644
index 000000000000..d403a8b24d7f
--- /dev/null
+++ b/arch/arm/boot/compressed/sdhi-sh7372.c
@@ -0,0 +1,95 @@
1/*
2 * SuperH Mobile SDHI
3 *
4 * Copyright (C) 2010 Magnus Damm
5 * Copyright (C) 2010 Kuninori Morimoto
6 * Copyright (C) 2010 Simon Horman
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file "COPYING" in the main directory of this archive
10 * for more details.
11 *
12 * Parts inspired by u-boot
13 */
14
15#include <linux/io.h>
16#include <mach/mmc.h>
17#include <linux/mmc/boot.h>
18#include <linux/mmc/tmio.h>
19
20#include "sdhi-shmobile.h"
21
22#define PORT179CR 0xe60520b3
23#define PORT180CR 0xe60520b4
24#define PORT181CR 0xe60520b5
25#define PORT182CR 0xe60520b6
26#define PORT183CR 0xe60520b7
27#define PORT184CR 0xe60520b8
28
29#define SMSTPCR3 0xe615013c
30
31#define CR_INPUT_ENABLE 0x10
32#define CR_FUNCTION1 0x01
33
34#define SDHI1_BASE (void __iomem *)0xe6860000
35#define SDHI_BASE SDHI1_BASE
36
37/* SuperH Mobile SDHI loader
38 *
39 * loads the zImage from an SD card starting from block 0
40 * on physical partition 1
41 *
42 * The image must be start with a vrl4 header and
43 * the zImage must start at offset 512 of the image. That is,
44 * at block 1 (=byte 512) of physical partition 1
45 *
46 * Use the following line to write the vrl4 formated zImage
47 * to an SD card
48 * # dd if=vrl4.out of=/dev/sdx bs=512
49 */
50asmlinkage void mmc_loader(unsigned short *buf, unsigned long len)
51{
52 int high_capacity;
53
54 mmc_init_progress();
55
56 mmc_update_progress(MMC_PROGRESS_ENTER);
57 /* Initialise SDHI1 */
58 /* PORT184CR: GPIO_FN_SDHICMD1 Control */
59 __raw_writeb(CR_FUNCTION1, PORT184CR);
60 /* PORT179CR: GPIO_FN_SDHICLK1 Control */
61 __raw_writeb(CR_INPUT_ENABLE|CR_FUNCTION1, PORT179CR);
62 /* PORT181CR: GPIO_FN_SDHID1_3 Control */
63 __raw_writeb(CR_FUNCTION1, PORT183CR);
64 /* PORT182CR: GPIO_FN_SDHID1_2 Control */
65 __raw_writeb(CR_FUNCTION1, PORT182CR);
66 /* PORT183CR: GPIO_FN_SDHID1_1 Control */
67 __raw_writeb(CR_FUNCTION1, PORT181CR);
68 /* PORT180CR: GPIO_FN_SDHID1_0 Control */
69 __raw_writeb(CR_FUNCTION1, PORT180CR);
70
71 /* Enable clock to SDHI1 hardware block */
72 __raw_writel(__raw_readl(SMSTPCR3) & ~(1 << 13), SMSTPCR3);
73
74 /* setup SDHI hardware */
75 mmc_update_progress(MMC_PROGRESS_INIT);
76 high_capacity = sdhi_boot_init(SDHI_BASE);
77 if (high_capacity < 0)
78 goto err;
79
80 mmc_update_progress(MMC_PROGRESS_LOAD);
81 /* load kernel */
82 if (sdhi_boot_do_read(SDHI_BASE, high_capacity,
83 0, /* Kernel is at block 1 */
84 (len + TMIO_BBS - 1) / TMIO_BBS, buf))
85 goto err;
86
87 /* Disable clock to SDHI1 hardware block */
88 __raw_writel(__raw_readl(SMSTPCR3) & (1 << 13), SMSTPCR3);
89
90 mmc_update_progress(MMC_PROGRESS_DONE);
91
92 return;
93err:
94 for(;;);
95}
diff --git a/arch/arm/boot/compressed/sdhi-shmobile.c b/arch/arm/boot/compressed/sdhi-shmobile.c
new file mode 100644
index 000000000000..bd3d46980955
--- /dev/null
+++ b/arch/arm/boot/compressed/sdhi-shmobile.c
@@ -0,0 +1,449 @@
1/*
2 * SuperH Mobile SDHI
3 *
4 * Copyright (C) 2010 Magnus Damm
5 * Copyright (C) 2010 Kuninori Morimoto
6 * Copyright (C) 2010 Simon Horman
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file "COPYING" in the main directory of this archive
10 * for more details.
11 *
12 * Parts inspired by u-boot
13 */
14
15#include <linux/io.h>
16#include <linux/mmc/host.h>
17#include <linux/mmc/core.h>
18#include <linux/mmc/mmc.h>
19#include <linux/mmc/sd.h>
20#include <linux/mmc/tmio.h>
21#include <mach/sdhi.h>
22
23#define OCR_FASTBOOT (1<<29)
24#define OCR_HCS (1<<30)
25#define OCR_BUSY (1<<31)
26
27#define RESP_CMD12 0x00000030
28
29static inline u16 sd_ctrl_read16(void __iomem *base, int addr)
30{
31 return __raw_readw(base + addr);
32}
33
34static inline u32 sd_ctrl_read32(void __iomem *base, int addr)
35{
36 return __raw_readw(base + addr) |
37 __raw_readw(base + addr + 2) << 16;
38}
39
40static inline void sd_ctrl_write16(void __iomem *base, int addr, u16 val)
41{
42 __raw_writew(val, base + addr);
43}
44
45static inline void sd_ctrl_write32(void __iomem *base, int addr, u32 val)
46{
47 __raw_writew(val, base + addr);
48 __raw_writew(val >> 16, base + addr + 2);
49}
50
51#define ALL_ERROR (TMIO_STAT_CMD_IDX_ERR | TMIO_STAT_CRCFAIL | \
52 TMIO_STAT_STOPBIT_ERR | TMIO_STAT_DATATIMEOUT | \
53 TMIO_STAT_RXOVERFLOW | TMIO_STAT_TXUNDERRUN | \
54 TMIO_STAT_CMDTIMEOUT | TMIO_STAT_ILL_ACCESS | \
55 TMIO_STAT_ILL_FUNC)
56
57static int sdhi_intr(void __iomem *base)
58{
59 unsigned long state = sd_ctrl_read32(base, CTL_STATUS);
60
61 if (state & ALL_ERROR) {
62 sd_ctrl_write32(base, CTL_STATUS, ~ALL_ERROR);
63 sd_ctrl_write32(base, CTL_IRQ_MASK,
64 ALL_ERROR |
65 sd_ctrl_read32(base, CTL_IRQ_MASK));
66 return -EINVAL;
67 }
68 if (state & TMIO_STAT_CMDRESPEND) {
69 sd_ctrl_write32(base, CTL_STATUS, ~TMIO_STAT_CMDRESPEND);
70 sd_ctrl_write32(base, CTL_IRQ_MASK,
71 TMIO_STAT_CMDRESPEND |
72 sd_ctrl_read32(base, CTL_IRQ_MASK));
73 return 0;
74 }
75 if (state & TMIO_STAT_RXRDY) {
76 sd_ctrl_write32(base, CTL_STATUS, ~TMIO_STAT_RXRDY);
77 sd_ctrl_write32(base, CTL_IRQ_MASK,
78 TMIO_STAT_RXRDY | TMIO_STAT_TXUNDERRUN |
79 sd_ctrl_read32(base, CTL_IRQ_MASK));
80 return 0;
81 }
82 if (state & TMIO_STAT_DATAEND) {
83 sd_ctrl_write32(base, CTL_STATUS, ~TMIO_STAT_DATAEND);
84 sd_ctrl_write32(base, CTL_IRQ_MASK,
85 TMIO_STAT_DATAEND |
86 sd_ctrl_read32(base, CTL_IRQ_MASK));
87 return 0;
88 }
89
90 return -EAGAIN;
91}
92
93static int sdhi_boot_wait_resp_end(void __iomem *base)
94{
95 int err = -EAGAIN, timeout = 10000000;
96
97 while (timeout--) {
98 err = sdhi_intr(base);
99 if (err != -EAGAIN)
100 break;
101 udelay(1);
102 }
103
104 return err;
105}
106
107/* SDHI_CLK_CTRL */
108#define CLK_MMC_ENABLE (1 << 8)
109#define CLK_MMC_INIT (1 << 6) /* clk / 256 */
110
111static void sdhi_boot_mmc_clk_stop(void __iomem *base)
112{
113 sd_ctrl_write16(base, CTL_CLK_AND_WAIT_CTL, 0x0000);
114 msleep(10);
115 sd_ctrl_write16(base, CTL_SD_CARD_CLK_CTL, ~CLK_MMC_ENABLE &
116 sd_ctrl_read16(base, CTL_SD_CARD_CLK_CTL));
117 msleep(10);
118}
119
120static void sdhi_boot_mmc_clk_start(void __iomem *base)
121{
122 sd_ctrl_write16(base, CTL_SD_CARD_CLK_CTL, CLK_MMC_ENABLE |
123 sd_ctrl_read16(base, CTL_SD_CARD_CLK_CTL));
124 msleep(10);
125 sd_ctrl_write16(base, CTL_CLK_AND_WAIT_CTL, CLK_MMC_ENABLE);
126 msleep(10);
127}
128
129static void sdhi_boot_reset(void __iomem *base)
130{
131 sd_ctrl_write16(base, CTL_RESET_SD, 0x0000);
132 msleep(10);
133 sd_ctrl_write16(base, CTL_RESET_SD, 0x0001);
134 msleep(10);
135}
136
137/* Set MMC clock / power.
138 * Note: This controller uses a simple divider scheme therefore it cannot
139 * run a MMC card at full speed (20MHz). The max clock is 24MHz on SD, but as
140 * MMC wont run that fast, it has to be clocked at 12MHz which is the next
141 * slowest setting.
142 */
143static int sdhi_boot_mmc_set_ios(void __iomem *base, struct mmc_ios *ios)
144{
145 if (sd_ctrl_read32(base, CTL_STATUS) & TMIO_STAT_CMD_BUSY)
146 return -EBUSY;
147
148 if (ios->clock)
149 sd_ctrl_write16(base, CTL_SD_CARD_CLK_CTL,
150 ios->clock | CLK_MMC_ENABLE);
151
152 /* Power sequence - OFF -> ON -> UP */
153 switch (ios->power_mode) {
154 case MMC_POWER_OFF: /* power down SD bus */
155 sdhi_boot_mmc_clk_stop(base);
156 break;
157 case MMC_POWER_ON: /* power up SD bus */
158 break;
159 case MMC_POWER_UP: /* start bus clock */
160 sdhi_boot_mmc_clk_start(base);
161 break;
162 }
163
164 switch (ios->bus_width) {
165 case MMC_BUS_WIDTH_1:
166 sd_ctrl_write16(base, CTL_SD_MEM_CARD_OPT, 0x80e0);
167 break;
168 case MMC_BUS_WIDTH_4:
169 sd_ctrl_write16(base, CTL_SD_MEM_CARD_OPT, 0x00e0);
170 break;
171 }
172
173 /* Let things settle. delay taken from winCE driver */
174 udelay(140);
175
176 return 0;
177}
178
179/* These are the bitmasks the tmio chip requires to implement the MMC response
180 * types. Note that R1 and R6 are the same in this scheme. */
181#define RESP_NONE 0x0300
182#define RESP_R1 0x0400
183#define RESP_R1B 0x0500
184#define RESP_R2 0x0600
185#define RESP_R3 0x0700
186#define DATA_PRESENT 0x0800
187#define TRANSFER_READ 0x1000
188
189static int sdhi_boot_request(void __iomem *base, struct mmc_command *cmd)
190{
191 int err, c = cmd->opcode;
192
193 switch (mmc_resp_type(cmd)) {
194 case MMC_RSP_NONE: c |= RESP_NONE; break;
195 case MMC_RSP_R1: c |= RESP_R1; break;
196 case MMC_RSP_R1B: c |= RESP_R1B; break;
197 case MMC_RSP_R2: c |= RESP_R2; break;
198 case MMC_RSP_R3: c |= RESP_R3; break;
199 default:
200 return -EINVAL;
201 }
202
203 /* No interrupts so this may not be cleared */
204 sd_ctrl_write32(base, CTL_STATUS, ~TMIO_STAT_CMDRESPEND);
205
206 sd_ctrl_write32(base, CTL_IRQ_MASK, TMIO_STAT_CMDRESPEND |
207 sd_ctrl_read32(base, CTL_IRQ_MASK));
208 sd_ctrl_write32(base, CTL_ARG_REG, cmd->arg);
209 sd_ctrl_write16(base, CTL_SD_CMD, c);
210
211
212 sd_ctrl_write32(base, CTL_IRQ_MASK,
213 ~(TMIO_STAT_CMDRESPEND | ALL_ERROR) &
214 sd_ctrl_read32(base, CTL_IRQ_MASK));
215
216 err = sdhi_boot_wait_resp_end(base);
217 if (err)
218 return err;
219
220 cmd->resp[0] = sd_ctrl_read32(base, CTL_RESPONSE);
221
222 return 0;
223}
224
225static int sdhi_boot_do_read_single(void __iomem *base, int high_capacity,
226 unsigned long block, unsigned short *buf)
227{
228 int err, i;
229
230 /* CMD17 - Read */
231 {
232 struct mmc_command cmd;
233
234 cmd.opcode = MMC_READ_SINGLE_BLOCK | \
235 TRANSFER_READ | DATA_PRESENT;
236 if (high_capacity)
237 cmd.arg = block;
238 else
239 cmd.arg = block * TMIO_BBS;
240 cmd.flags = MMC_RSP_R1;
241 err = sdhi_boot_request(base, &cmd);
242 if (err)
243 return err;
244 }
245
246 sd_ctrl_write32(base, CTL_IRQ_MASK,
247 ~(TMIO_STAT_DATAEND | TMIO_STAT_RXRDY |
248 TMIO_STAT_TXUNDERRUN) &
249 sd_ctrl_read32(base, CTL_IRQ_MASK));
250 err = sdhi_boot_wait_resp_end(base);
251 if (err)
252 return err;
253
254 sd_ctrl_write16(base, CTL_SD_XFER_LEN, TMIO_BBS);
255 for (i = 0; i < TMIO_BBS / sizeof(*buf); i++)
256 *buf++ = sd_ctrl_read16(base, RESP_CMD12);
257
258 err = sdhi_boot_wait_resp_end(base);
259 if (err)
260 return err;
261
262 return 0;
263}
264
265int sdhi_boot_do_read(void __iomem *base, int high_capacity,
266 unsigned long offset, unsigned short count,
267 unsigned short *buf)
268{
269 unsigned long i;
270 int err = 0;
271
272 for (i = 0; i < count; i++) {
273 err = sdhi_boot_do_read_single(base, high_capacity, offset + i,
274 buf + (i * TMIO_BBS /
275 sizeof(*buf)));
276 if (err)
277 return err;
278 }
279
280 return 0;
281}
282
283#define VOLTAGES (MMC_VDD_32_33 | MMC_VDD_33_34)
284
285int sdhi_boot_init(void __iomem *base)
286{
287 bool sd_v2 = false, sd_v1_0 = false;
288 unsigned short cid;
289 int err, high_capacity = 0;
290
291 sdhi_boot_mmc_clk_stop(base);
292 sdhi_boot_reset(base);
293
294 /* mmc0: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 21 width 0 timing 0 */
295 {
296 struct mmc_ios ios;
297 ios.power_mode = MMC_POWER_ON;
298 ios.bus_width = MMC_BUS_WIDTH_1;
299 ios.clock = CLK_MMC_INIT;
300 err = sdhi_boot_mmc_set_ios(base, &ios);
301 if (err)
302 return err;
303 }
304
305 /* CMD0 */
306 {
307 struct mmc_command cmd;
308 msleep(1);
309 cmd.opcode = MMC_GO_IDLE_STATE;
310 cmd.arg = 0;
311 cmd.flags = MMC_RSP_NONE;
312 err = sdhi_boot_request(base, &cmd);
313 if (err)
314 return err;
315 msleep(2);
316 }
317
318 /* CMD8 - Test for SD version 2 */
319 {
320 struct mmc_command cmd;
321 cmd.opcode = SD_SEND_IF_COND;
322 cmd.arg = (VOLTAGES != 0) << 8 | 0xaa;
323 cmd.flags = MMC_RSP_R1;
324 err = sdhi_boot_request(base, &cmd); /* Ignore error */
325 if ((cmd.resp[0] & 0xff) == 0xaa)
326 sd_v2 = true;
327 }
328
329 /* CMD55 - Get OCR (SD) */
330 {
331 int timeout = 1000;
332 struct mmc_command cmd;
333
334 cmd.arg = 0;
335
336 do {
337 cmd.opcode = MMC_APP_CMD;
338 cmd.flags = MMC_RSP_R1;
339 cmd.arg = 0;
340 err = sdhi_boot_request(base, &cmd);
341 if (err)
342 break;
343
344 cmd.opcode = SD_APP_OP_COND;
345 cmd.flags = MMC_RSP_R3;
346 cmd.arg = (VOLTAGES & 0xff8000);
347 if (sd_v2)
348 cmd.arg |= OCR_HCS;
349 cmd.arg |= OCR_FASTBOOT;
350 err = sdhi_boot_request(base, &cmd);
351 if (err)
352 break;
353
354 msleep(1);
355 } while((!(cmd.resp[0] & OCR_BUSY)) && --timeout);
356
357 if (!err && timeout) {
358 if (!sd_v2)
359 sd_v1_0 = true;
360 high_capacity = (cmd.resp[0] & OCR_HCS) == OCR_HCS;
361 }
362 }
363
364 /* CMD1 - Get OCR (MMC) */
365 if (!sd_v2 && !sd_v1_0) {
366 int timeout = 1000;
367 struct mmc_command cmd;
368
369 do {
370 cmd.opcode = MMC_SEND_OP_COND;
371 cmd.arg = VOLTAGES | OCR_HCS;
372 cmd.flags = MMC_RSP_R3;
373 err = sdhi_boot_request(base, &cmd);
374 if (err)
375 return err;
376
377 msleep(1);
378 } while((!(cmd.resp[0] & OCR_BUSY)) && --timeout);
379
380 if (!timeout)
381 return -EAGAIN;
382
383 high_capacity = (cmd.resp[0] & OCR_HCS) == OCR_HCS;
384 }
385
386 /* CMD2 - Get CID */
387 {
388 struct mmc_command cmd;
389 cmd.opcode = MMC_ALL_SEND_CID;
390 cmd.arg = 0;
391 cmd.flags = MMC_RSP_R2;
392 err = sdhi_boot_request(base, &cmd);
393 if (err)
394 return err;
395 }
396
397 /* CMD3
398 * MMC: Set the relative address
399 * SD: Get the relative address
400 * Also puts the card into the standby state
401 */
402 {
403 struct mmc_command cmd;
404 cmd.opcode = MMC_SET_RELATIVE_ADDR;
405 cmd.arg = 0;
406 cmd.flags = MMC_RSP_R1;
407 err = sdhi_boot_request(base, &cmd);
408 if (err)
409 return err;
410 cid = cmd.resp[0] >> 16;
411 }
412
413 /* CMD9 - Get CSD */
414 {
415 struct mmc_command cmd;
416 cmd.opcode = MMC_SEND_CSD;
417 cmd.arg = cid << 16;
418 cmd.flags = MMC_RSP_R2;
419 err = sdhi_boot_request(base, &cmd);
420 if (err)
421 return err;
422 }
423
424 /* CMD7 - Select the card */
425 {
426 struct mmc_command cmd;
427 cmd.opcode = MMC_SELECT_CARD;
428 //cmd.arg = rca << 16;
429 cmd.arg = cid << 16;
430 //cmd.flags = MMC_RSP_R1B;
431 cmd.flags = MMC_RSP_R1;
432 err = sdhi_boot_request(base, &cmd);
433 if (err)
434 return err;
435 }
436
437 /* CMD16 - Set the block size */
438 {
439 struct mmc_command cmd;
440 cmd.opcode = MMC_SET_BLOCKLEN;
441 cmd.arg = TMIO_BBS;
442 cmd.flags = MMC_RSP_R1;
443 err = sdhi_boot_request(base, &cmd);
444 if (err)
445 return err;
446 }
447
448 return high_capacity;
449}
diff --git a/arch/arm/boot/compressed/sdhi-shmobile.h b/arch/arm/boot/compressed/sdhi-shmobile.h
new file mode 100644
index 000000000000..92eaa09f985e
--- /dev/null
+++ b/arch/arm/boot/compressed/sdhi-shmobile.h
@@ -0,0 +1,11 @@
1#ifndef SDHI_MOBILE_H
2#define SDHI_MOBILE_H
3
4#include <linux/compiler.h>
5
6int sdhi_boot_do_read(void __iomem *base, int high_capacity,
7 unsigned long offset, unsigned short count,
8 unsigned short *buf);
9int sdhi_boot_init(void __iomem *base);
10
11#endif
diff --git a/arch/arm/mach-shmobile/include/mach/sdhi-sh7372.h b/arch/arm/mach-shmobile/include/mach/sdhi-sh7372.h
new file mode 100644
index 000000000000..4a81b01f1e8f
--- /dev/null
+++ b/arch/arm/mach-shmobile/include/mach/sdhi-sh7372.h
@@ -0,0 +1,21 @@
1#ifndef SDHI_SH7372_H
2#define SDHI_SH7372_H
3
4#define SDGENCNTA 0xfe40009c
5
6/* The countdown of SDGENCNTA is controlled by
7 * ZB3D2CLK which runs at 149.5MHz.
8 * That is 149.5ticks/us. Approximate this as 150ticks/us.
9 */
10static void udelay(int us)
11{
12 __raw_writel(us * 150, SDGENCNTA);
13 while(__raw_readl(SDGENCNTA)) ;
14}
15
16static void msleep(int ms)
17{
18 udelay(ms * 1000);
19}
20
21#endif
diff --git a/arch/arm/mach-shmobile/include/mach/sdhi.h b/arch/arm/mach-shmobile/include/mach/sdhi.h
new file mode 100644
index 000000000000..0ec9e69f2c3b
--- /dev/null
+++ b/arch/arm/mach-shmobile/include/mach/sdhi.h
@@ -0,0 +1,16 @@
1#ifndef SDHI_H
2#define SDHI_H
3
4/**************************************************
5 *
6 * CPU specific settings
7 *
8 **************************************************/
9
10#ifdef CONFIG_ARCH_SH7372
11#include "mach/sdhi-sh7372.h"
12#else
13#error "unsupported CPU."
14#endif
15
16#endif /* SDHI_H */
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-01 08:48:35 -0500