Barry Song | b3b665b | 2013-03-21 16:27:19 +0800 | [diff] [blame] | 1 | /* |
| 2 | * SDHCI support for SiRF primaII and marco SoCs |
| 3 | * |
| 4 | * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company. |
| 5 | * |
| 6 | * Licensed under GPLv2 or later. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/delay.h> |
| 10 | #include <linux/device.h> |
| 11 | #include <linux/mmc/host.h> |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/of.h> |
| 14 | #include <linux/of_gpio.h> |
| 15 | #include <linux/mmc/slot-gpio.h> |
Barry Song | b3b665b | 2013-03-21 16:27:19 +0800 | [diff] [blame] | 16 | #include "sdhci-pltfm.h" |
| 17 | |
| 18 | struct sdhci_sirf_priv { |
| 19 | struct clk *clk; |
| 20 | int gpio_cd; |
| 21 | }; |
| 22 | |
| 23 | static unsigned int sdhci_sirf_get_max_clk(struct sdhci_host *host) |
| 24 | { |
| 25 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
Arnd Bergmann | e2f6aac | 2013-06-27 11:17:25 -0400 | [diff] [blame] | 26 | struct sdhci_sirf_priv *priv = sdhci_pltfm_priv(pltfm_host); |
Barry Song | b3b665b | 2013-03-21 16:27:19 +0800 | [diff] [blame] | 27 | return clk_get_rate(priv->clk); |
| 28 | } |
| 29 | |
| 30 | static struct sdhci_ops sdhci_sirf_ops = { |
| 31 | .get_max_clock = sdhci_sirf_get_max_clk, |
Russell King | 2317f56 | 2014-04-25 12:57:07 +0100 | [diff] [blame] | 32 | .set_bus_width = sdhci_set_bus_width, |
Russell King | 03231f9 | 2014-04-25 12:57:12 +0100 | [diff] [blame^] | 33 | .reset = sdhci_reset, |
Barry Song | b3b665b | 2013-03-21 16:27:19 +0800 | [diff] [blame] | 34 | }; |
| 35 | |
| 36 | static struct sdhci_pltfm_data sdhci_sirf_pdata = { |
| 37 | .ops = &sdhci_sirf_ops, |
| 38 | .quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL | |
| 39 | SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK | |
| 40 | SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN | |
| 41 | SDHCI_QUIRK_INVERTED_WRITE_PROTECT | |
| 42 | SDHCI_QUIRK_DELAY_AFTER_POWER, |
| 43 | }; |
| 44 | |
| 45 | static int sdhci_sirf_probe(struct platform_device *pdev) |
| 46 | { |
| 47 | struct sdhci_host *host; |
| 48 | struct sdhci_pltfm_host *pltfm_host; |
| 49 | struct sdhci_sirf_priv *priv; |
Arnd Bergmann | e2f6aac | 2013-06-27 11:17:25 -0400 | [diff] [blame] | 50 | struct clk *clk; |
| 51 | int gpio_cd; |
Barry Song | b3b665b | 2013-03-21 16:27:19 +0800 | [diff] [blame] | 52 | int ret; |
| 53 | |
Arnd Bergmann | e2f6aac | 2013-06-27 11:17:25 -0400 | [diff] [blame] | 54 | clk = devm_clk_get(&pdev->dev, NULL); |
| 55 | if (IS_ERR(clk)) { |
Barry Song | b3b665b | 2013-03-21 16:27:19 +0800 | [diff] [blame] | 56 | dev_err(&pdev->dev, "unable to get clock"); |
Arnd Bergmann | e2f6aac | 2013-06-27 11:17:25 -0400 | [diff] [blame] | 57 | return PTR_ERR(clk); |
Barry Song | b3b665b | 2013-03-21 16:27:19 +0800 | [diff] [blame] | 58 | } |
| 59 | |
Arnd Bergmann | e2f6aac | 2013-06-27 11:17:25 -0400 | [diff] [blame] | 60 | if (pdev->dev.of_node) |
| 61 | gpio_cd = of_get_named_gpio(pdev->dev.of_node, "cd-gpios", 0); |
| 62 | else |
| 63 | gpio_cd = -EINVAL; |
Barry Song | b3b665b | 2013-03-21 16:27:19 +0800 | [diff] [blame] | 64 | |
Arnd Bergmann | e2f6aac | 2013-06-27 11:17:25 -0400 | [diff] [blame] | 65 | host = sdhci_pltfm_init(pdev, &sdhci_sirf_pdata, sizeof(struct sdhci_sirf_priv)); |
| 66 | if (IS_ERR(host)) |
| 67 | return PTR_ERR(host); |
Barry Song | b3b665b | 2013-03-21 16:27:19 +0800 | [diff] [blame] | 68 | |
| 69 | pltfm_host = sdhci_priv(host); |
Arnd Bergmann | e2f6aac | 2013-06-27 11:17:25 -0400 | [diff] [blame] | 70 | priv = sdhci_pltfm_priv(pltfm_host); |
| 71 | priv->clk = clk; |
| 72 | priv->gpio_cd = gpio_cd; |
Barry Song | b3b665b | 2013-03-21 16:27:19 +0800 | [diff] [blame] | 73 | |
| 74 | sdhci_get_of_property(pdev); |
| 75 | |
Arnd Bergmann | e2f6aac | 2013-06-27 11:17:25 -0400 | [diff] [blame] | 76 | ret = clk_prepare_enable(priv->clk); |
| 77 | if (ret) |
| 78 | goto err_clk_prepare; |
Barry Song | b3b665b | 2013-03-21 16:27:19 +0800 | [diff] [blame] | 79 | |
| 80 | ret = sdhci_add_host(host); |
| 81 | if (ret) |
| 82 | goto err_sdhci_add; |
| 83 | |
| 84 | /* |
| 85 | * We must request the IRQ after sdhci_add_host(), as the tasklet only |
| 86 | * gets setup in sdhci_add_host() and we oops. |
| 87 | */ |
| 88 | if (gpio_is_valid(priv->gpio_cd)) { |
Laurent Pinchart | 214fc30 | 2013-08-08 12:38:31 +0200 | [diff] [blame] | 89 | ret = mmc_gpio_request_cd(host->mmc, priv->gpio_cd, 0); |
Barry Song | b3b665b | 2013-03-21 16:27:19 +0800 | [diff] [blame] | 90 | if (ret) { |
| 91 | dev_err(&pdev->dev, "card detect irq request failed: %d\n", |
| 92 | ret); |
| 93 | goto err_request_cd; |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | return 0; |
| 98 | |
| 99 | err_request_cd: |
| 100 | sdhci_remove_host(host, 0); |
| 101 | err_sdhci_add: |
| 102 | clk_disable_unprepare(priv->clk); |
Arnd Bergmann | e2f6aac | 2013-06-27 11:17:25 -0400 | [diff] [blame] | 103 | err_clk_prepare: |
Barry Song | b3b665b | 2013-03-21 16:27:19 +0800 | [diff] [blame] | 104 | sdhci_pltfm_free(pdev); |
Barry Song | b3b665b | 2013-03-21 16:27:19 +0800 | [diff] [blame] | 105 | return ret; |
| 106 | } |
| 107 | |
| 108 | static int sdhci_sirf_remove(struct platform_device *pdev) |
| 109 | { |
| 110 | struct sdhci_host *host = platform_get_drvdata(pdev); |
| 111 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
Arnd Bergmann | e2f6aac | 2013-06-27 11:17:25 -0400 | [diff] [blame] | 112 | struct sdhci_sirf_priv *priv = sdhci_pltfm_priv(pltfm_host); |
Barry Song | b3b665b | 2013-03-21 16:27:19 +0800 | [diff] [blame] | 113 | |
| 114 | sdhci_pltfm_unregister(pdev); |
| 115 | |
| 116 | if (gpio_is_valid(priv->gpio_cd)) |
| 117 | mmc_gpio_free_cd(host->mmc); |
| 118 | |
| 119 | clk_disable_unprepare(priv->clk); |
| 120 | return 0; |
| 121 | } |
| 122 | |
| 123 | #ifdef CONFIG_PM_SLEEP |
| 124 | static int sdhci_sirf_suspend(struct device *dev) |
| 125 | { |
| 126 | struct sdhci_host *host = dev_get_drvdata(dev); |
| 127 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
Arnd Bergmann | e2f6aac | 2013-06-27 11:17:25 -0400 | [diff] [blame] | 128 | struct sdhci_sirf_priv *priv = sdhci_pltfm_priv(pltfm_host); |
Barry Song | b3b665b | 2013-03-21 16:27:19 +0800 | [diff] [blame] | 129 | int ret; |
| 130 | |
| 131 | ret = sdhci_suspend_host(host); |
| 132 | if (ret) |
| 133 | return ret; |
| 134 | |
| 135 | clk_disable(priv->clk); |
| 136 | |
| 137 | return 0; |
| 138 | } |
| 139 | |
| 140 | static int sdhci_sirf_resume(struct device *dev) |
| 141 | { |
| 142 | struct sdhci_host *host = dev_get_drvdata(dev); |
| 143 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
Arnd Bergmann | e2f6aac | 2013-06-27 11:17:25 -0400 | [diff] [blame] | 144 | struct sdhci_sirf_priv *priv = sdhci_pltfm_priv(pltfm_host); |
Barry Song | b3b665b | 2013-03-21 16:27:19 +0800 | [diff] [blame] | 145 | int ret; |
| 146 | |
| 147 | ret = clk_enable(priv->clk); |
| 148 | if (ret) { |
| 149 | dev_dbg(dev, "Resume: Error enabling clock\n"); |
| 150 | return ret; |
| 151 | } |
| 152 | |
| 153 | return sdhci_resume_host(host); |
| 154 | } |
| 155 | |
| 156 | static SIMPLE_DEV_PM_OPS(sdhci_sirf_pm_ops, sdhci_sirf_suspend, sdhci_sirf_resume); |
| 157 | #endif |
| 158 | |
| 159 | static const struct of_device_id sdhci_sirf_of_match[] = { |
| 160 | { .compatible = "sirf,prima2-sdhc" }, |
| 161 | { } |
| 162 | }; |
| 163 | MODULE_DEVICE_TABLE(of, sdhci_sirf_of_match); |
| 164 | |
| 165 | static struct platform_driver sdhci_sirf_driver = { |
| 166 | .driver = { |
| 167 | .name = "sdhci-sirf", |
| 168 | .owner = THIS_MODULE, |
| 169 | .of_match_table = sdhci_sirf_of_match, |
| 170 | #ifdef CONFIG_PM_SLEEP |
| 171 | .pm = &sdhci_sirf_pm_ops, |
| 172 | #endif |
| 173 | }, |
| 174 | .probe = sdhci_sirf_probe, |
| 175 | .remove = sdhci_sirf_remove, |
| 176 | }; |
| 177 | |
| 178 | module_platform_driver(sdhci_sirf_driver); |
| 179 | |
| 180 | MODULE_DESCRIPTION("SDHCI driver for SiRFprimaII/SiRFmarco"); |
| 181 | MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); |
| 182 | MODULE_LICENSE("GPL v2"); |