Darwin Rambo | 29f2f57 | 2014-02-11 11:06:37 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2013 Broadcom Corporation. |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0+ |
| 5 | */ |
| 6 | |
| 7 | #include <common.h> |
| 8 | #include <malloc.h> |
| 9 | #include <sdhci.h> |
Masahiro Yamada | 56a931c | 2016-09-21 11:28:55 +0900 | [diff] [blame] | 10 | #include <linux/errno.h> |
Darwin Rambo | 29f2f57 | 2014-02-11 11:06:37 -0800 | [diff] [blame] | 11 | #include <asm/kona-common/clk.h> |
| 12 | |
| 13 | #define SDHCI_CORECTRL_OFFSET 0x00008000 |
| 14 | #define SDHCI_CORECTRL_EN 0x01 |
| 15 | #define SDHCI_CORECTRL_RESET 0x02 |
| 16 | |
| 17 | #define SDHCI_CORESTAT_OFFSET 0x00008004 |
| 18 | #define SDHCI_CORESTAT_CD_SW 0x01 |
| 19 | |
| 20 | #define SDHCI_COREIMR_OFFSET 0x00008008 |
| 21 | #define SDHCI_COREIMR_IP 0x01 |
| 22 | |
| 23 | static int init_kona_mmc_core(struct sdhci_host *host) |
| 24 | { |
| 25 | unsigned int mask; |
| 26 | unsigned int timeout; |
| 27 | |
| 28 | if (sdhci_readb(host, SDHCI_SOFTWARE_RESET) & SDHCI_RESET_ALL) { |
| 29 | printf("%s: sd host controller reset error\n", __func__); |
| 30 | return 1; |
| 31 | } |
| 32 | |
| 33 | /* For kona a hardware reset before anything else. */ |
| 34 | mask = sdhci_readl(host, SDHCI_CORECTRL_OFFSET) | SDHCI_CORECTRL_RESET; |
| 35 | sdhci_writel(host, mask, SDHCI_CORECTRL_OFFSET); |
| 36 | |
| 37 | /* Wait max 100 ms */ |
| 38 | timeout = 1000; |
| 39 | do { |
| 40 | if (timeout == 0) { |
| 41 | printf("%s: reset timeout error\n", __func__); |
| 42 | return 1; |
| 43 | } |
| 44 | timeout--; |
| 45 | udelay(100); |
| 46 | } while (0 == |
| 47 | (sdhci_readl(host, SDHCI_CORECTRL_OFFSET) & |
| 48 | SDHCI_CORECTRL_RESET)); |
| 49 | |
| 50 | /* Clear the reset bit. */ |
| 51 | mask = mask & ~SDHCI_CORECTRL_RESET; |
| 52 | sdhci_writel(host, mask, SDHCI_CORECTRL_OFFSET); |
| 53 | |
| 54 | /* Enable AHB clock */ |
| 55 | mask = sdhci_readl(host, SDHCI_CORECTRL_OFFSET); |
| 56 | sdhci_writel(host, mask | SDHCI_CORECTRL_EN, SDHCI_CORECTRL_OFFSET); |
| 57 | |
| 58 | /* Enable interrupts */ |
| 59 | sdhci_writel(host, SDHCI_COREIMR_IP, SDHCI_COREIMR_OFFSET); |
| 60 | |
| 61 | /* Make sure Card is detected in controller */ |
| 62 | mask = sdhci_readl(host, SDHCI_CORESTAT_OFFSET); |
| 63 | sdhci_writel(host, mask | SDHCI_CORESTAT_CD_SW, SDHCI_CORESTAT_OFFSET); |
| 64 | |
| 65 | /* Wait max 100 ms */ |
| 66 | timeout = 1000; |
| 67 | while (!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) { |
| 68 | if (timeout == 0) { |
| 69 | printf("%s: CARD DETECT timeout error\n", __func__); |
| 70 | return 1; |
| 71 | } |
| 72 | timeout--; |
| 73 | udelay(100); |
| 74 | } |
| 75 | return 0; |
| 76 | } |
| 77 | |
| 78 | int kona_sdhci_init(int dev_index, u32 min_clk, u32 quirks) |
| 79 | { |
| 80 | int ret = 0; |
| 81 | u32 max_clk; |
| 82 | void *reg_base; |
| 83 | struct sdhci_host *host = NULL; |
| 84 | |
| 85 | host = (struct sdhci_host *)malloc(sizeof(struct sdhci_host)); |
| 86 | if (!host) { |
| 87 | printf("%s: sdhci host malloc fail!\n", __func__); |
| 88 | return -ENOMEM; |
| 89 | } |
| 90 | switch (dev_index) { |
| 91 | case 0: |
| 92 | reg_base = (void *)CONFIG_SYS_SDIO_BASE0; |
| 93 | ret = clk_sdio_enable(reg_base, CONFIG_SYS_SDIO0_MAX_CLK, |
| 94 | &max_clk); |
| 95 | break; |
| 96 | case 1: |
| 97 | reg_base = (void *)CONFIG_SYS_SDIO_BASE1; |
| 98 | ret = clk_sdio_enable(reg_base, CONFIG_SYS_SDIO1_MAX_CLK, |
| 99 | &max_clk); |
| 100 | break; |
| 101 | case 2: |
| 102 | reg_base = (void *)CONFIG_SYS_SDIO_BASE2; |
| 103 | ret = clk_sdio_enable(reg_base, CONFIG_SYS_SDIO2_MAX_CLK, |
| 104 | &max_clk); |
| 105 | break; |
| 106 | case 3: |
| 107 | reg_base = (void *)CONFIG_SYS_SDIO_BASE3; |
| 108 | ret = clk_sdio_enable(reg_base, CONFIG_SYS_SDIO3_MAX_CLK, |
| 109 | &max_clk); |
| 110 | break; |
| 111 | default: |
| 112 | printf("%s: sdio dev index %d not supported\n", |
| 113 | __func__, dev_index); |
| 114 | ret = -EINVAL; |
| 115 | } |
Darwin Rambo | cc350cb | 2014-05-26 13:31:12 -0700 | [diff] [blame] | 116 | if (ret) { |
| 117 | free(host); |
Darwin Rambo | 29f2f57 | 2014-02-11 11:06:37 -0800 | [diff] [blame] | 118 | return ret; |
Darwin Rambo | cc350cb | 2014-05-26 13:31:12 -0700 | [diff] [blame] | 119 | } |
Darwin Rambo | 29f2f57 | 2014-02-11 11:06:37 -0800 | [diff] [blame] | 120 | |
| 121 | host->name = "kona-sdhci"; |
| 122 | host->ioaddr = reg_base; |
| 123 | host->quirks = quirks; |
Darwin Rambo | 29f2f57 | 2014-02-11 11:06:37 -0800 | [diff] [blame] | 124 | |
Darwin Rambo | cc350cb | 2014-05-26 13:31:12 -0700 | [diff] [blame] | 125 | if (init_kona_mmc_core(host)) { |
| 126 | free(host); |
Darwin Rambo | 29f2f57 | 2014-02-11 11:06:37 -0800 | [diff] [blame] | 127 | return -EINVAL; |
Darwin Rambo | cc350cb | 2014-05-26 13:31:12 -0700 | [diff] [blame] | 128 | } |
Darwin Rambo | 29f2f57 | 2014-02-11 11:06:37 -0800 | [diff] [blame] | 129 | |
| 130 | if (quirks & SDHCI_QUIRK_REG32_RW) |
| 131 | host->version = sdhci_readl(host, SDHCI_HOST_VERSION - 2) >> 16; |
| 132 | else |
| 133 | host->version = sdhci_readw(host, SDHCI_HOST_VERSION); |
| 134 | |
| 135 | add_sdhci(host, max_clk, min_clk); |
| 136 | return ret; |
| 137 | } |