diff options
Diffstat (limited to 'drivers/misc/modem_if_u1/modem_modemctl_device_xmm6260.c')
-rw-r--r-- | drivers/misc/modem_if_u1/modem_modemctl_device_xmm6260.c | 303 |
1 files changed, 303 insertions, 0 deletions
diff --git a/drivers/misc/modem_if_u1/modem_modemctl_device_xmm6260.c b/drivers/misc/modem_if_u1/modem_modemctl_device_xmm6260.c new file mode 100644 index 00000000000..c2d50677aa6 --- /dev/null +++ b/drivers/misc/modem_if_u1/modem_modemctl_device_xmm6260.c @@ -0,0 +1,303 @@ +/* /linux/drivers/misc/modem_if/modem_modemctl_device_xmm6260.c + * + * Copyright (C) 2010 Google, Inc. + * Copyright (C) 2010 Samsung Electronics. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/init.h> + +#include <linux/irq.h> +#include <linux/interrupt.h> +#include <linux/gpio.h> +#include <linux/delay.h> +#include <linux/platform_device.h> + +#include <linux/platform_data/modem.h> +#include "modem_prj.h" + +static int xmm6260_on(struct modem_ctl *mc) +{ + mif_info("xmm6260_on()\n"); + + if (!mc->gpio_cp_reset || !mc->gpio_cp_on || !mc->gpio_reset_req_n) { + mif_err("no gpio data\n"); + return -ENXIO; + } + + if (mc->gpio_revers_bias_clear) + mc->gpio_revers_bias_clear(); + + + gpio_set_value(mc->gpio_cp_on, 0); + gpio_set_value(mc->gpio_cp_reset, 0); + udelay(160); + gpio_set_value(mc->gpio_pda_active, 0); + msleep(500); /* must be >500ms for CP can boot up under -20 degrees */ + gpio_set_value(mc->gpio_cp_reset, 1); + udelay(160); + gpio_set_value(mc->gpio_reset_req_n, 1); + udelay(160); + gpio_set_value(mc->gpio_cp_on, 1); + udelay(60); + gpio_set_value(mc->gpio_cp_on, 0); + msleep(20); + + if (mc->gpio_revers_bias_restore) + mc->gpio_revers_bias_restore(); + + + gpio_set_value(mc->gpio_pda_active, 1); + + mc->phone_state = STATE_BOOTING; + + return 0; + +} + +static int xmm6260_off(struct modem_ctl *mc) +{ + mif_info("xmm6260_off()\n"); + + if (!mc->gpio_cp_reset || !mc->gpio_cp_on) { + mif_err("no gpio data\n"); + return -ENXIO; + } + + gpio_set_value(mc->gpio_cp_on, 0); + gpio_set_value(mc->gpio_cp_reset, 0); + + mc->phone_state = STATE_OFFLINE; + + return 0; +} + + +static int xmm6260_reset(struct modem_ctl *mc) +{ + + mif_info("xmm6260_reset()\n"); + + if (!mc->gpio_cp_reset || !mc->gpio_reset_req_n) + return -ENXIO; + + if (mc->gpio_revers_bias_clear) + mc->gpio_revers_bias_clear(); + + gpio_set_value(mc->gpio_cp_reset, 0); + gpio_set_value(mc->gpio_reset_req_n, 0); + + mc->phone_state = STATE_OFFLINE; + + msleep(20); + + gpio_set_value(mc->gpio_cp_reset, 1); +/* TODO: check the reset timming with C2C connection */ + udelay(160); + + gpio_set_value(mc->gpio_reset_req_n, 1); + udelay(100); + + gpio_set_value(mc->gpio_cp_on, 1); + udelay(60); + gpio_set_value(mc->gpio_cp_on, 0); + msleep(20); + + if (mc->gpio_revers_bias_restore) + mc->gpio_revers_bias_restore(); + + mc->phone_state = STATE_BOOTING; + + return 0; +} + +static int xmm6260_boot_on(struct modem_ctl *mc) +{ + mif_info("xmm6260_boot_on()\n"); + + if (!mc->gpio_flm_uart_sel) { + mif_err("no gpio data\n"); + return -ENXIO; + } + + gpio_set_value(mc->gpio_flm_uart_sel, 0); + + return 0; +} + +static int xmm6260_boot_off(struct modem_ctl *mc) +{ + mif_info("xmm6260_boot_off()\n"); + + if (!mc->gpio_flm_uart_sel) { + mif_err("no gpio data\n"); + return -ENXIO; + } + + gpio_set_value(mc->gpio_flm_uart_sel, 1); + + return 0; +} + +static irqreturn_t phone_active_irq_handler(int irq, void *_mc) +{ + int phone_reset = 0; + int phone_active_value = 0; + int cp_dump_value = 0; + int phone_state = 0; + struct modem_ctl *mc = (struct modem_ctl *)_mc; + struct link_device *ld; + + disable_irq_nosync(mc->irq_phone_active); + + if (!mc->gpio_cp_reset || !mc->gpio_phone_active || + !mc->gpio_cp_dump_int) { + mif_err("no gpio data\n"); + return IRQ_HANDLED; + } + + phone_reset = gpio_get_value(mc->gpio_cp_reset); + phone_active_value = gpio_get_value(mc->gpio_phone_active); + cp_dump_value = gpio_get_value(mc->gpio_cp_dump_int); + + mif_info("PA EVENT : reset =%d, pa=%d, cp_dump=%d\n", + phone_reset, phone_active_value, cp_dump_value); + + if (phone_reset && phone_active_value) + phone_state = STATE_BOOTING; + else if (phone_reset && !phone_active_value) { + if (mc->phone_state == STATE_BOOTING) + goto set_type; + if (cp_dump_value) + phone_state = STATE_CRASH_EXIT; + else + phone_state = STATE_CRASH_RESET; + if (mc->iod) { + ld = get_current_link(mc->iod); + if (ld->terminate_comm) + ld->terminate_comm(ld, mc->iod); + } + } else + phone_state = STATE_OFFLINE; + + if (mc->iod && mc->iod->modem_state_changed) + mc->iod->modem_state_changed(mc->iod, phone_state); + + if (mc->bootd && mc->bootd->modem_state_changed) + mc->bootd->modem_state_changed(mc->bootd, phone_state); + +set_type: + if (phone_active_value) + irq_set_irq_type(mc->irq_phone_active, IRQ_TYPE_LEVEL_LOW); + else + irq_set_irq_type(mc->irq_phone_active, IRQ_TYPE_LEVEL_HIGH); + enable_irq(mc->irq_phone_active); + + return IRQ_HANDLED; +} + +static irqreturn_t sim_detect_irq_handler(int irq, void *_mc) +{ + struct modem_ctl *mc = (struct modem_ctl *)_mc; + + if (mc->iod && mc->iod->sim_state_changed) + mc->iod->sim_state_changed(mc->iod, + !gpio_get_value(mc->gpio_sim_detect)); + + return IRQ_HANDLED; +} + +static void xmm6260_get_ops(struct modem_ctl *mc) +{ + mc->ops.modem_on = xmm6260_on; + mc->ops.modem_off = xmm6260_off; + mc->ops.modem_reset = xmm6260_reset; + mc->ops.modem_boot_on = xmm6260_boot_on; + mc->ops.modem_boot_off = xmm6260_boot_off; +} + +int xmm6260_init_modemctl_device(struct modem_ctl *mc, + struct modem_data *pdata) +{ + int ret; + struct platform_device *pdev; + + mc->gpio_cp_on = pdata->gpio_cp_on; + mc->gpio_reset_req_n = pdata->gpio_reset_req_n; + mc->gpio_cp_reset = pdata->gpio_cp_reset; + mc->gpio_pda_active = pdata->gpio_pda_active; + mc->gpio_phone_active = pdata->gpio_phone_active; + mc->gpio_cp_dump_int = pdata->gpio_cp_dump_int; + mc->gpio_flm_uart_sel = pdata->gpio_flm_uart_sel; + mc->gpio_cp_warm_reset = pdata->gpio_cp_warm_reset; + mc->gpio_revers_bias_clear = pdata->gpio_revers_bias_clear; + mc->gpio_revers_bias_restore = pdata->gpio_revers_bias_restore; + mc->gpio_sim_detect = pdata->gpio_sim_detect; + + pdev = to_platform_device(mc->dev); + /* mc->irq_phone_active = platform_get_irq(pdev, 0); */ + mc->irq_phone_active = gpio_to_irq(mc->gpio_phone_active); + + if (mc->gpio_sim_detect) + mc->irq_sim_detect = gpio_to_irq(mc->gpio_sim_detect); + + xmm6260_get_ops(mc); + + /* initialize phone active */ + ret = request_irq(mc->irq_phone_active, phone_active_irq_handler, + IRQF_NO_SUSPEND | IRQF_TRIGGER_HIGH, + "phone_active", mc); + if (ret) { + mif_err("failed to request_irq:%d\n", ret); + goto err_phone_active_request_irq; + } + + ret = enable_irq_wake(mc->irq_phone_active); + if (ret) { + mif_err("failed to enable_irq_wake:%d\n", ret); + goto err_phone_active_set_wake_irq; + } + + /* initialize sim_state if gpio_sim_detect exists */ + mc->sim_state.online = false; + mc->sim_state.changed = false; + if (mc->gpio_sim_detect) { + ret = request_irq(mc->irq_sim_detect, sim_detect_irq_handler, + IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, + "sim_detect", mc); + if (ret) { + mif_err("failed to request_irq: %d\n", ret); + goto err_sim_detect_request_irq; + } + + ret = enable_irq_wake(mc->irq_sim_detect); + if (ret) { + mif_err("failed to enable_irq_wake: %d\n", ret); + goto err_sim_detect_set_wake_irq; + } + + /* initialize sim_state => insert: gpio=0, remove: gpio=1 */ + mc->sim_state.online = !gpio_get_value(mc->gpio_sim_detect); + } + + return ret; + +err_sim_detect_set_wake_irq: + free_irq(mc->irq_sim_detect, mc); +err_sim_detect_request_irq: + mc->sim_state.online = false; + mc->sim_state.changed = false; +err_phone_active_set_wake_irq: + free_irq(mc->irq_phone_active, mc); +err_phone_active_request_irq: + return ret; +} |