* Anuj Aggarwal <anuj.aggarwal@xxxxxx> [091123 10:24]:
> Add init code for HSMMC controller for AM3517 platform.
This seems like a copy of the older mmc-twl4030.c?
Can you please specify what is different compared to
mmc-twl4030.c?
I'd rather not have all this code duplicated, it's going
to be a pain to maintain. I guess with the regulator
framework most of this code should be generic.
Regards,
Tony
> Signed-off-by: Anuj Aggarwal <anuj.aggarwal@xxxxxx>
> ---
> arch/arm/mach-omap2/mmc-am3517evm.c | 267 +++++++++++++++++++++++++++++++++++
> arch/arm/mach-omap2/mmc-am3517evm.h | 22 +++
> 2 files changed, 289 insertions(+), 0 deletions(-)
> create mode 100644 arch/arm/mach-omap2/mmc-am3517evm.c
> create mode 100644 arch/arm/mach-omap2/mmc-am3517evm.h
>
> diff --git a/arch/arm/mach-omap2/mmc-am3517evm.c b/arch/arm/mach-omap2/mmc-am3517evm.c
> new file mode 100644
> index 0000000..7995239
> --- /dev/null
> +++ b/arch/arm/mach-omap2/mmc-am3517evm.c
> @@ -0,0 +1,267 @@
> +/*
> + * linux/arch/arm/mach-omap2/mmc-am3517evm.c
> + *
> + * Copyright (C) 2009 Texas Instruments Incorporated
> + * Author: Anuj Aggarwal <anuj.aggarwal@xxxxxx>
> + *
> + * Based on mach-omap2/mmc-twl4030.c
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +#include <linux/err.h>
> +#include <linux/io.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/interrupt.h>
> +#include <linux/delay.h>
> +#include <linux/gpio.h>
> +
> +#include <mach/hardware.h>
> +#include <plat/control.h>
> +#include <plat/mmc.h>
> +#include <plat/board.h>
> +#include "mmc-am3517evm.h"
> +
> +#define LDO_CLR 0x00
> +#define VSEL_S2_CLR 0x40
> +
> +#define VMMC1_DEV_GRP 0x27
> +#define VMMC1_CLR 0x00
> +#define VMMC1_315V 0x03
> +#define VMMC1_300V 0x02
> +#define VMMC1_285V 0x01
> +#define VMMC1_185V 0x00
> +#define VMMC1_DEDICATED 0x2A
> +
> +#define VMMC2_DEV_GRP 0x2B
> +#define VMMC2_CLR 0x40
> +#define VMMC2_315V 0x0c
> +#define VMMC2_300V 0x0b
> +#define VMMC2_285V 0x0a
> +#define VMMC2_260V 0x08
> +#define VMMC2_185V 0x06
> +#define VMMC2_DEDICATED 0x2E
> +
> +#define VMMC_DEV_GRP_P1 0x20
> +
> +#define HSMMC_NAME_LEN 9
> +
> +#if defined(CONFIG_REGULATOR) || \
> + (defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE) || \
> + defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE))
> +
> +/*
> + * MMC definitions
> + *
> + */
> +static struct mmc_controller {
> + struct omap_mmc_platform_data *mmc;
> + u8 vmmc_dev_grp;
> + u8 vmmc_dedicated;
> + char name[HSMMC_NAME_LEN];
> +} hsmmc[] = {
> + {
> + .vmmc_dev_grp = VMMC1_DEV_GRP,
> + .vmmc_dedicated = VMMC1_DEDICATED,
> + },
> + {
> + .vmmc_dev_grp = VMMC2_DEV_GRP,
> + .vmmc_dedicated = VMMC2_DEDICATED,
> + },
> +};
> +
> +static int mmc_card_detect(int irq)
> +{
> + unsigned i;
> +
> + for (i = 0; i < ARRAY_SIZE(hsmmc); i++) {
> + struct omap_mmc_platform_data *mmc;
> +
> + mmc = hsmmc[i].mmc;
> + if (!mmc)
> + continue;
> + if (irq != mmc->slots[0].card_detect_irq)
> + continue;
> +
> + /* NOTE: assumes card detect signal is active-low */
> + return !gpio_get_value_cansleep(mmc->slots[0].switch_pin);
> + }
> + return -ENOSYS;
> +}
> +
> +static int mmc_get_ro(struct device *dev, int slot)
> +{
> + struct omap_mmc_platform_data *mmc = dev->platform_data;
> +
> + /* NOTE: assumes write protect signal is active-high */
> + return gpio_get_value_cansleep(mmc->slots[0].gpio_wp);
> +}
> +
> +/*
> + * MMC Slot Initialization.
> + */
> +static int mmc_late_init(struct device *dev)
> +{
> + struct omap_mmc_platform_data *mmc = dev->platform_data;
> + int ret = 0;
> + int i;
> +
> + ret = gpio_request(mmc->slots[0].switch_pin, "mmc_cd");
> + if (ret)
> + goto done;
> + ret = gpio_direction_input(mmc->slots[0].switch_pin);
> + if (ret)
> + goto err;
> +
> + for (i = 0; i < ARRAY_SIZE(hsmmc); i++) {
> + if (hsmmc[i].name == mmc->slots[0].name) {
> + hsmmc[i].mmc = mmc;
> + break;
> + }
> + }
> +
> + return 0;
> +
> +err:
> + gpio_free(mmc->slots[0].switch_pin);
> +done:
> + mmc->slots[0].card_detect_irq = 0;
> + mmc->slots[0].card_detect = NULL;
> +
> + dev_err(dev, "err %d configuring card detect\n", ret);
> + return ret;
> +}
> +
> +static void mmc_cleanup(struct device *dev)
> +{
> + struct omap_mmc_platform_data *mmc = dev->platform_data;
> +
> + gpio_free(mmc->slots[0].switch_pin);
> +}
> +
> +#ifdef CONFIG_PM
> +
> +static int mmc_suspend(struct device *dev, int slot)
> +{
> + struct omap_mmc_platform_data *mmc = dev->platform_data;
> +
> + disable_irq(mmc->slots[0].card_detect_irq);
> + return 0;
> +}
> +
> +static int mmc_resume(struct device *dev, int slot)
> +{
> + struct omap_mmc_platform_data *mmc = dev->platform_data;
> +
> + enable_irq(mmc->slots[0].card_detect_irq);
> + return 0;
> +}
> +
> +#else
> +#define mmc_suspend NULL
> +#define mmc_resume NULL
> +#endif
> +
> +/*
> + * the MMC power setting function
> + */
> +
> +static int mmc1_set_power(struct device *dev, int slot, int power_on,
> + int vdd)
> +{
> + return 0;
> +}
> +
> +static int mmc2_set_power(struct device *dev, int slot, int power_on, int vdd)
> +{
> + return 0;
> +}
> +
> +static struct omap_mmc_platform_data *hsmmc_data[OMAP34XX_NR_MMC] __initdata;
> +
> +void __init am3517_mmc_init(struct am3517_hsmmc_info *controllers)
> +{
> + struct am3517_hsmmc_info *c;
> + int nr_hsmmc = ARRAY_SIZE(hsmmc_data);
> +
> + for (c = controllers; c->mmc; c++) {
> + struct mmc_controller *mmc_control = hsmmc + c->mmc - 1;
> + struct omap_mmc_platform_data *mmc = hsmmc_data[c->mmc - 1];
> +
> + if (!c->mmc || c->mmc > nr_hsmmc) {
> + pr_debug("MMC%d: no such controller\n", c->mmc);
> + continue;
> + }
> + if (mmc) {
> + pr_debug("MMC%d: already configured\n", c->mmc);
> + continue;
> + }
> +
> + mmc = kzalloc(sizeof(struct omap_mmc_platform_data),
> + GFP_KERNEL);
> + if (!mmc) {
> + pr_err("Cannot allocate memory for mmc device!\n");
> + return;
> + }
> +
> + sprintf(mmc_control->name, "mmc%islot%i", c->mmc, 1);
> + mmc->slots[0].name = mmc_control->name;
> + mmc->nr_slots = 1;
> + mmc->slots[0].ocr_mask = MMC_VDD_165_195 |
> + MMC_VDD_26_27 | MMC_VDD_27_28 |
> + MMC_VDD_29_30 |
> + MMC_VDD_30_31 | MMC_VDD_31_32;
> + mmc->slots[0].wires = c->wires;
> + mmc->slots[0].internal_clock = !c->ext_clock;
> + mmc->dma_mask = 0xffffffff;
> +
> + if (1) {
> + mmc->init = mmc_late_init;
> + mmc->cleanup = mmc_cleanup;
> + mmc->suspend = mmc_suspend;
> + mmc->resume = mmc_resume;
> +
> + mmc->slots[0].switch_pin = c->gpio_cd;
> + mmc->slots[0].card_detect_irq = gpio_to_irq(c->gpio_cd);
> + mmc->slots[0].card_detect = mmc_card_detect;
> + } else
> + mmc->slots[0].switch_pin = -EINVAL;
> +
> + /* write protect normally uses an OMAP gpio */
> + if (gpio_is_valid(c->gpio_wp)) {
> + gpio_request(c->gpio_wp, "mmc_wp");
> + gpio_direction_input(c->gpio_wp);
> +
> + mmc->slots[0].gpio_wp = c->gpio_wp;
> + mmc->slots[0].get_ro = mmc_get_ro;
> + } else
> + mmc->slots[0].gpio_wp = -EINVAL;
> +
> + /* NOTE: we assume OMAP's MMC1 and MMC2 use
> + * the TWL4030's VMMC1 and VMMC2, respectively;
> + * and that OMAP's MMC3 isn't used.
> + */
> +
> + switch (c->mmc) {
> + case 1:
> + mmc->slots[0].set_power = mmc1_set_power;
> + break;
> + case 2:
> + mmc->slots[0].set_power = mmc2_set_power;
> + break;
> + default:
> + pr_err("MMC%d configuration not supported!\n", c->mmc);
> + continue;
> + }
> + hsmmc_data[c->mmc - 1] = mmc;
> + }
> +
> + omap2_init_mmc(hsmmc_data, OMAP34XX_NR_MMC);
> +}
> +#else
> +inline void am3517_mmc_init(struct am3517_hsmmc_info *info)
> +{
> +}
> +#endif
> diff --git a/arch/arm/mach-omap2/mmc-am3517evm.h b/arch/arm/mach-omap2/mmc-am3517evm.h
> new file mode 100644
> index 0000000..bf2d339
> --- /dev/null
> +++ b/arch/arm/mach-omap2/mmc-am3517evm.h
> @@ -0,0 +1,22 @@
> +/*
> + * MMC definitions for OMAP3517 / AM3517
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +
> +struct am3517_hsmmc_info {
> + u8 mmc; /* controller 1/2/3 */
> + u8 wires; /* 1/4/8 wires */
> + bool transceiver; /* MMC-2 option */
> + bool ext_clock; /* use external pin for input clock */
> + bool cover_only; /* No card detect - just cover switch */
> + int gpio_cd; /* or -EINVAL */
> + int gpio_wp; /* or -EINVAL */
> + char *name; /* or NULL for default */
> + struct device *dev; /* returned: pointer to mmc adapter */
> + int ocr_mask; /* temporary HACK */
> +};
> +
> +void am3517_mmc_init(struct am3517_hsmmc_info *);
> --
> 1.6.2.4
>
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