From 9d35873161c98d3b9d92adacd7ee4c8fb1740068 Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Mon, 20 Feb 2017 18:34:20 +0900 Subject: [PATCH] ARM: uniphier: add simple eMMC load APIs instead of ROM API Re-use of routines embedded in the Boot ROM requires a function pointer table for each SoC. This is not nice in terms of the maintainability in a long run. Implement simple eMMC load APIs that are commonly used for LD11, LD20, and hopefully future SoCs. Signed-off-by: Masahiro Yamada --- .../arm/mach-uniphier/boot-device/spl_board.c | 253 ++++++++++++++---- 1 file changed, 195 insertions(+), 58 deletions(-) diff --git a/arch/arm/mach-uniphier/boot-device/spl_board.c b/arch/arm/mach-uniphier/boot-device/spl_board.c index 0aac9241c3..bd47ac874b 100644 --- a/arch/arm/mach-uniphier/boot-device/spl_board.c +++ b/arch/arm/mach-uniphier/boot-device/spl_board.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 2016 Socionext Inc. + * Copyright (C) 2017 Socionext Inc. * Author: Masahiro Yamada * * SPDX-License-Identifier: GPL-2.0+ @@ -7,87 +7,218 @@ #include #include +#include +#include #include #include #include "../soc-info.h" -struct uniphier_romfunc_table { - void *mmc_send_cmd; - void *mmc_card_blockaddr; - void *mmc_switch_part; - void *mmc_load_image; -}; +#define MMC_CMD_SWITCH 6 +#define MMC_CMD_SELECT_CARD 7 +#define MMC_CMD_SEND_CSD 9 +#define MMC_CMD_READ_MULTIPLE_BLOCK 18 -static const struct uniphier_romfunc_table uniphier_ld11_romfunc_table = { - .mmc_send_cmd = (void *)0x20d8, - .mmc_card_blockaddr = (void *)0x1b68, - .mmc_switch_part = (void *)0x1c38, - .mmc_load_image = (void *)0x2e48, -}; +#define EXT_CSD_PART_CONF 179 /* R/W */ + +#define MMC_RSP_PRESENT BIT(0) +#define MMC_RSP_136 BIT(1) /* 136 bit response */ +#define MMC_RSP_CRC BIT(2) /* expect valid crc */ +#define MMC_RSP_BUSY BIT(3) /* card may send busy */ +#define MMC_RSP_OPCODE BIT(4) /* response contains opcode */ + +#define MMC_RSP_NONE (0) +#define MMC_RSP_R1 (MMC_RSP_PRESENT | MMC_RSP_CRC | MMC_RSP_OPCODE) +#define MMC_RSP_R1b (MMC_RSP_PRESENT | MMC_RSP_CRC | MMC_RSP_OPCODE | \ + MMC_RSP_BUSY) +#define MMC_RSP_R2 (MMC_RSP_PRESENT | MMC_RSP_136 | MMC_RSP_CRC) +#define MMC_RSP_R3 (MMC_RSP_PRESENT) +#define MMC_RSP_R4 (MMC_RSP_PRESENT) +#define MMC_RSP_R5 (MMC_RSP_PRESENT | MMC_RSP_CRC | MMC_RSP_OPCODE) +#define MMC_RSP_R6 (MMC_RSP_PRESENT | MMC_RSP_CRC | MMC_RSP_OPCODE) +#define MMC_RSP_R7 (MMC_RSP_PRESENT | MMC_RSP_CRC | MMC_RSP_OPCODE) + +#define SDHCI_DMA_ADDRESS 0x00 +#define SDHCI_BLOCK_SIZE 0x04 +#define SDHCI_MAKE_BLKSZ(dma, blksz) ((((dma) & 0x7) << 12) | ((blksz) & 0xFFF)) +#define SDHCI_BLOCK_COUNT 0x06 +#define SDHCI_ARGUMENT 0x08 +#define SDHCI_TRANSFER_MODE 0x0C +#define SDHCI_TRNS_DMA BIT(0) +#define SDHCI_TRNS_BLK_CNT_EN BIT(1) +#define SDHCI_TRNS_ACMD12 BIT(2) +#define SDHCI_TRNS_READ BIT(4) +#define SDHCI_TRNS_MULTI BIT(5) +#define SDHCI_COMMAND 0x0E +#define SDHCI_CMD_RESP_MASK 0x03 +#define SDHCI_CMD_CRC 0x08 +#define SDHCI_CMD_INDEX 0x10 +#define SDHCI_CMD_DATA 0x20 +#define SDHCI_CMD_ABORTCMD 0xC0 +#define SDHCI_CMD_RESP_NONE 0x00 +#define SDHCI_CMD_RESP_LONG 0x01 +#define SDHCI_CMD_RESP_SHORT 0x02 +#define SDHCI_CMD_RESP_SHORT_BUSY 0x03 +#define SDHCI_MAKE_CMD(c, f) ((((c) & 0xff) << 8) | ((f) & 0xff)) +#define SDHCI_RESPONSE 0x10 +#define SDHCI_HOST_CONTROL 0x28 +#define SDHCI_CTRL_DMA_MASK 0x18 +#define SDHCI_CTRL_SDMA 0x00 +#define SDHCI_BLOCK_GAP_CONTROL 0x2A +#define SDHCI_SOFTWARE_RESET 0x2F +#define SDHCI_RESET_CMD 0x02 +#define SDHCI_RESET_DATA 0x04 +#define SDHCI_INT_STATUS 0x30 +#define SDHCI_INT_RESPONSE BIT(0) +#define SDHCI_INT_DATA_END BIT(1) +#define SDHCI_INT_ERROR BIT(15) +#define SDHCI_SIGNAL_ENABLE 0x38 + +/* RCA assigned by Boot ROM */ +#define UNIPHIER_EMMC_RCA 0x1000 -static const struct uniphier_romfunc_table uniphier_ld20_romfunc_table = { - .mmc_send_cmd = (void *)0x2130, - .mmc_card_blockaddr = (void *)0x1ba0, - .mmc_switch_part = (void *)0x1c70, - .mmc_load_image = (void *)0x2ef0, +struct uniphier_mmc_cmd { + unsigned int cmdidx; + unsigned int resp_type; + unsigned int cmdarg; + unsigned int is_data; }; -int uniphier_rom_get_mmc_funcptr(int (**send_cmd)(u32, u32), - int (**card_blockaddr)(u32), - int (**switch_part)(int), - int (**load_image)(u32, uintptr_t, u32)) +static int uniphier_emmc_send_cmd(void __iomem *host_base, + struct uniphier_mmc_cmd *cmd) { - const struct uniphier_romfunc_table *table; - - switch (uniphier_get_soc_id()) { - case UNIPHIER_LD11_ID: - table = &uniphier_ld11_romfunc_table; - break; - case UNIPHIER_LD20_ID: - table = &uniphier_ld20_romfunc_table; - break; - default: - printf("unsupported SoC\n"); - return -EINVAL; - } + u32 mode = 0; + u32 mask = SDHCI_INT_RESPONSE; + u32 stat, flags; + + writel(U32_MAX, host_base + SDHCI_INT_STATUS); + writel(0, host_base + SDHCI_SIGNAL_ENABLE); + writel(cmd->cmdarg, host_base + SDHCI_ARGUMENT); + + if (cmd->is_data) + mode = SDHCI_TRNS_DMA | SDHCI_TRNS_BLK_CNT_EN | + SDHCI_TRNS_ACMD12 | SDHCI_TRNS_READ | + SDHCI_TRNS_MULTI; + + writew(mode, host_base + SDHCI_TRANSFER_MODE); + + if (!(cmd->resp_type & MMC_RSP_PRESENT)) + flags = SDHCI_CMD_RESP_NONE; + else if (cmd->resp_type & MMC_RSP_136) + flags = SDHCI_CMD_RESP_LONG; + else if (cmd->resp_type & MMC_RSP_BUSY) + flags = SDHCI_CMD_RESP_SHORT_BUSY; + else + flags = SDHCI_CMD_RESP_SHORT; + + if (cmd->resp_type & MMC_RSP_CRC) + flags |= SDHCI_CMD_CRC; + if (cmd->resp_type & MMC_RSP_OPCODE) + flags |= SDHCI_CMD_INDEX; + if (cmd->is_data) + flags |= SDHCI_CMD_DATA; - *send_cmd = table->mmc_send_cmd; - *card_blockaddr = table->mmc_card_blockaddr; - *switch_part = table->mmc_switch_part; - *load_image = table->mmc_load_image; + if (cmd->resp_type & MMC_RSP_BUSY || cmd->is_data) + mask |= SDHCI_INT_DATA_END; + + writew(SDHCI_MAKE_CMD(cmd->cmdidx, flags), host_base + SDHCI_COMMAND); + + do { + stat = readl(host_base + SDHCI_INT_STATUS); + if (stat & SDHCI_INT_ERROR) + return -EIO; + + } while ((stat & mask) != mask); return 0; } -static int spl_board_load_image(struct spl_image_info *spl_image, - struct spl_boot_device *bootdev) +static int uniphier_emmc_switch_part(void __iomem *host_base, int part_num) { - int (*send_cmd)(u32 cmd, u32 arg); - int (*card_blockaddr)(u32 rca); - int (*switch_part)(int part); - int (*load_image)(u32 dev_addr, uintptr_t load_addr, u32 block_cnt); - u32 dev_addr = CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR; - const u32 rca = 0x1000; /* RCA assigned by Boot ROM */ + struct uniphier_mmc_cmd cmd = {}; + + cmd.cmdidx = MMC_CMD_SWITCH; + cmd.resp_type = MMC_RSP_R1b; + cmd.cmdarg = (EXT_CSD_PART_CONF << 16) | (part_num << 8) | (3 << 24); + + return uniphier_emmc_send_cmd(host_base, &cmd); +} + +static int uniphier_emmc_is_over_2gb(void __iomem *host_base) +{ + struct uniphier_mmc_cmd cmd = {}; + u32 csd40, csd72; /* CSD[71:40], CSD[103:72] */ int ret; - ret = uniphier_rom_get_mmc_funcptr(&send_cmd, &card_blockaddr, - &switch_part, &load_image); + cmd.cmdidx = MMC_CMD_SEND_CSD; + cmd.resp_type = MMC_RSP_R2; + cmd.cmdarg = UNIPHIER_EMMC_RCA << 16; + + ret = uniphier_emmc_send_cmd(host_base, &cmd); if (ret) return ret; + csd40 = readl(host_base + SDHCI_RESPONSE + 4); + csd72 = readl(host_base + SDHCI_RESPONSE + 8); + + return !(~csd40 & 0xffc00380) && !(~csd72 & 0x3); +} + +static int uniphier_emmc_load_image(void __iomem *host_base, u32 dev_addr, + unsigned long load_addr, u32 block_cnt) +{ + struct uniphier_mmc_cmd cmd = {}; + u8 tmp; + + WARN_ON(load_addr >> 32); + + writel(load_addr, host_base + SDHCI_DMA_ADDRESS); + writew(SDHCI_MAKE_BLKSZ(7, 512), host_base + SDHCI_BLOCK_SIZE); + writew(block_cnt, host_base + SDHCI_BLOCK_COUNT); + + tmp = readb(host_base + SDHCI_HOST_CONTROL); + tmp &= ~SDHCI_CTRL_DMA_MASK; + tmp |= SDHCI_CTRL_SDMA; + writeb(tmp, host_base + SDHCI_HOST_CONTROL); + + tmp = readb(host_base + SDHCI_BLOCK_GAP_CONTROL); + tmp &= ~1; /* clear Stop At Block Gap Request */ + writeb(tmp, host_base + SDHCI_BLOCK_GAP_CONTROL); + + cmd.cmdidx = MMC_CMD_READ_MULTIPLE_BLOCK; + cmd.resp_type = MMC_RSP_R1; + cmd.cmdarg = dev_addr; + cmd.is_data = 1; + + return uniphier_emmc_send_cmd(host_base, &cmd); +} + +static int spl_board_load_image(struct spl_image_info *spl_image, + struct spl_boot_device *bootdev) +{ + u32 dev_addr = CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR; + void __iomem *host_base = (void __iomem *)0x5a000200; + struct uniphier_mmc_cmd cmd = {}; + int ret; + /* * deselect card before SEND_CSD command. * Do not check the return code. It fails, but it is OK. */ - (*send_cmd)(0x071a0000, 0); /* CMD7 (arg=0) */ + cmd.cmdidx = MMC_CMD_SELECT_CARD; + cmd.resp_type = MMC_RSP_R1; + + uniphier_emmc_send_cmd(host_base, &cmd); /* CMD7 (arg=0) */ /* reset CMD Line */ - writeb(0x6, 0x5a00022f); - while (readb(0x5a00022f)) + writeb(SDHCI_RESET_CMD | SDHCI_RESET_DATA, + host_base + SDHCI_SOFTWARE_RESET); + while (readb(host_base + SDHCI_SOFTWARE_RESET)) cpu_relax(); - ret = (*card_blockaddr)(rca); + ret = uniphier_emmc_is_over_2gb(host_base); + if (ret < 0) + return ret; if (ret) { debug("card is block addressing\n"); } else { @@ -95,15 +226,20 @@ static int spl_board_load_image(struct spl_image_info *spl_image, dev_addr *= 512; } - ret = (*send_cmd)(0x071a0000, rca << 16); /* CMD7: select card again */ + cmd.cmdarg = UNIPHIER_EMMC_RCA << 16; + + /* select card again */ + ret = uniphier_emmc_send_cmd(host_base, &cmd); if (ret) printf("failed to select card\n"); - ret = (*switch_part)(1); /* Switch to Boot Partition 1 */ + /* Switch to Boot Partition 1 */ + ret = uniphier_emmc_switch_part(host_base, 1); if (ret) printf("failed to switch partition\n"); - ret = (*load_image)(dev_addr, CONFIG_SYS_TEXT_BASE, 1); + ret = uniphier_emmc_load_image(host_base, dev_addr, + CONFIG_SYS_TEXT_BASE, 1); if (ret) { printf("failed to load image\n"); return ret; @@ -113,8 +249,9 @@ static int spl_board_load_image(struct spl_image_info *spl_image, if (ret) return ret; - ret = (*load_image)(dev_addr, spl_image->load_addr, - spl_image->size / 512); + ret = uniphier_emmc_load_image(host_base, dev_addr, + spl_image->load_addr, + spl_image->size / 512); if (ret) { printf("failed to load image\n"); return ret; -- 2.39.5