| /* Copyright (c) 2012, The Linux Foundation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 and |
| * only version 2 as published by the Free Software Foundation. |
| * |
| * 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/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/regulator/consumer.h> |
| #include <linux/err.h> |
| #include <linux/io.h> |
| #include <linux/delay.h> |
| #include <linux/clk.h> |
| #include <linux/interrupt.h> |
| |
| #include <mach/msm_iomap.h> |
| #include <mach/subsystem_restart.h> |
| #include <mach/msm_smsm.h> |
| #include <mach/peripheral-loader.h> |
| |
| #include "smd_private.h" |
| #include "ramdump.h" |
| #include "peripheral-loader.h" |
| #include "pil-q6v4.h" |
| #include "scm-pas.h" |
| |
| #define MSS_S_HCLK_CTL (MSM_CLK_CTL_BASE + 0x2C70) |
| #define MSS_SLP_CLK_CTL (MSM_CLK_CTL_BASE + 0x2C60) |
| #define SFAB_MSS_M_ACLK_CTL (MSM_CLK_CTL_BASE + 0x2340) |
| #define SFAB_MSS_S_HCLK_CTL (MSM_CLK_CTL_BASE + 0x2C00) |
| #define MSS_RESET (MSM_CLK_CTL_BASE + 0x2C64) |
| |
| struct q6v4_modem { |
| struct q6v4_data q6_fw; |
| struct q6v4_data q6_sw; |
| void __iomem *modem_base; |
| void *fw_ramdump_dev; |
| void *sw_ramdump_dev; |
| void *smem_ramdump_dev; |
| struct subsys_device *subsys; |
| struct subsys_desc subsys_desc; |
| int crash_shutdown; |
| int loadable; |
| }; |
| |
| static DEFINE_MUTEX(pil_q6v4_modem_lock); |
| static unsigned pil_q6v4_modem_count; |
| |
| /* Bring modem subsystem out of reset */ |
| static void pil_q6v4_init_modem(void __iomem *base, void __iomem *jtag_clk) |
| { |
| mutex_lock(&pil_q6v4_modem_lock); |
| if (!pil_q6v4_modem_count) { |
| /* Enable MSS clocks */ |
| writel_relaxed(0x10, SFAB_MSS_M_ACLK_CTL); |
| writel_relaxed(0x10, SFAB_MSS_S_HCLK_CTL); |
| writel_relaxed(0x10, MSS_S_HCLK_CTL); |
| writel_relaxed(0x10, MSS_SLP_CLK_CTL); |
| /* Wait for clocks to enable */ |
| mb(); |
| udelay(10); |
| |
| /* De-assert MSS reset */ |
| writel_relaxed(0x0, MSS_RESET); |
| mb(); |
| udelay(10); |
| /* Enable MSS */ |
| writel_relaxed(0x7, base); |
| } |
| |
| /* Enable JTAG clocks */ |
| /* TODO: Remove if/when Q6 software enables them? */ |
| writel_relaxed(0x10, jtag_clk); |
| |
| pil_q6v4_modem_count++; |
| mutex_unlock(&pil_q6v4_modem_lock); |
| } |
| |
| /* Put modem subsystem back into reset */ |
| static void pil_q6v4_shutdown_modem(void) |
| { |
| mutex_lock(&pil_q6v4_modem_lock); |
| if (pil_q6v4_modem_count) |
| pil_q6v4_modem_count--; |
| if (pil_q6v4_modem_count == 0) |
| writel_relaxed(0x1, MSS_RESET); |
| mutex_unlock(&pil_q6v4_modem_lock); |
| } |
| |
| static int pil_q6v4_modem_boot(struct pil_desc *pil) |
| { |
| struct q6v4_data *drv = pil_to_q6v4_data(pil); |
| struct q6v4_modem *mdm = dev_get_drvdata(pil->dev); |
| int err; |
| |
| err = pil_q6v4_power_up(drv); |
| if (err) |
| return err; |
| |
| pil_q6v4_init_modem(mdm->modem_base, drv->jtag_clk_reg); |
| return pil_q6v4_boot(pil); |
| } |
| |
| static int pil_q6v4_modem_shutdown(struct pil_desc *pil) |
| { |
| struct q6v4_data *drv = pil_to_q6v4_data(pil); |
| int ret; |
| |
| ret = pil_q6v4_shutdown(pil); |
| if (ret) |
| return ret; |
| pil_q6v4_shutdown_modem(); |
| pil_q6v4_power_down(drv); |
| return 0; |
| } |
| |
| static struct pil_reset_ops pil_q6v4_modem_ops = { |
| .init_image = pil_q6v4_init_image, |
| .auth_and_reset = pil_q6v4_modem_boot, |
| .shutdown = pil_q6v4_modem_shutdown, |
| .proxy_vote = pil_q6v4_make_proxy_votes, |
| .proxy_unvote = pil_q6v4_remove_proxy_votes, |
| }; |
| |
| static struct pil_reset_ops pil_q6v4_modem_ops_trusted = { |
| .init_image = pil_q6v4_init_image_trusted, |
| .auth_and_reset = pil_q6v4_boot_trusted, |
| .shutdown = pil_q6v4_shutdown_trusted, |
| .proxy_vote = pil_q6v4_make_proxy_votes, |
| .proxy_unvote = pil_q6v4_remove_proxy_votes, |
| }; |
| |
| static void log_modem_sfr(void) |
| { |
| u32 size; |
| char *smem_reason, reason[81]; |
| |
| smem_reason = smem_get_entry(SMEM_SSR_REASON_MSS0, &size); |
| if (!smem_reason || !size) { |
| pr_err("modem subsystem failure reason: (unknown, smem_get_entry failed).\n"); |
| return; |
| } |
| if (!smem_reason[0]) { |
| pr_err("modem subsystem failure reason: (unknown, init string found).\n"); |
| return; |
| } |
| |
| size = min(size, sizeof(reason)-1); |
| memcpy(reason, smem_reason, size); |
| reason[size] = '\0'; |
| pr_err("modem subsystem failure reason: %s.\n", reason); |
| |
| smem_reason[0] = '\0'; |
| wmb(); |
| } |
| |
| static void restart_modem(struct q6v4_modem *drv) |
| { |
| log_modem_sfr(); |
| subsystem_restart_dev(drv->subsys); |
| } |
| |
| #define desc_to_modem(d) container_of(d, struct q6v4_modem, subsys_desc) |
| |
| static int modem_shutdown(const struct subsys_desc *subsys) |
| { |
| struct q6v4_modem *drv = desc_to_modem(subsys); |
| |
| /* The watchdogs keep running even after the modem is shutdown */ |
| writel_relaxed(0x0, drv->q6_fw.wdog_base + 0x24); |
| writel_relaxed(0x0, drv->q6_sw.wdog_base + 0x24); |
| mb(); |
| |
| if (drv->loadable) { |
| pil_force_shutdown("modem"); |
| pil_force_shutdown("modem_fw"); |
| } |
| |
| disable_irq_nosync(drv->q6_fw.wdog_irq); |
| disable_irq_nosync(drv->q6_sw.wdog_irq); |
| |
| return 0; |
| } |
| |
| static int modem_powerup(const struct subsys_desc *subsys) |
| { |
| struct q6v4_modem *drv = desc_to_modem(subsys); |
| |
| if (drv->loadable) { |
| pil_force_boot("modem_fw"); |
| pil_force_boot("modem"); |
| } |
| enable_irq(drv->q6_fw.wdog_irq); |
| enable_irq(drv->q6_sw.wdog_irq); |
| return 0; |
| } |
| |
| void modem_crash_shutdown(const struct subsys_desc *subsys) |
| { |
| struct q6v4_modem *drv = desc_to_modem(subsys); |
| |
| drv->crash_shutdown = 1; |
| smsm_reset_modem(SMSM_RESET); |
| } |
| |
| static struct ramdump_segment sw_segments[] = { |
| {0x89000000, 0x8D400000 - 0x89000000}, |
| }; |
| |
| static struct ramdump_segment fw_segments[] = { |
| {0x8D400000, 0x8DA00000 - 0x8D400000}, |
| }; |
| |
| static struct ramdump_segment smem_segments[] = { |
| {0x80000000, 0x00200000}, |
| }; |
| |
| static int modem_ramdump(int enable, const struct subsys_desc *subsys) |
| { |
| struct q6v4_modem *drv = desc_to_modem(subsys); |
| int ret; |
| |
| if (!enable) |
| return 0; |
| |
| ret = do_ramdump(drv->sw_ramdump_dev, sw_segments, |
| ARRAY_SIZE(sw_segments)); |
| if (ret < 0) |
| return ret; |
| |
| ret = do_ramdump(drv->fw_ramdump_dev, fw_segments, |
| ARRAY_SIZE(fw_segments)); |
| if (ret < 0) |
| return ret; |
| |
| ret = do_ramdump(drv->smem_ramdump_dev, smem_segments, |
| ARRAY_SIZE(smem_segments)); |
| if (ret < 0) |
| return ret; |
| |
| return 0; |
| } |
| |
| static void smsm_state_cb(void *data, uint32_t old_state, uint32_t new_state) |
| { |
| struct q6v4_modem *drv = data; |
| |
| /* Ignore if we're the one that set SMSM_RESET */ |
| if (drv->crash_shutdown) |
| return; |
| |
| if (new_state & SMSM_RESET) { |
| pr_err("Probable fatal error on the modem.\n"); |
| restart_modem(drv); |
| } |
| } |
| |
| static irqreturn_t modem_wdog_bite_irq(int irq, void *dev_id) |
| { |
| struct q6v4_modem *drv = dev_id; |
| restart_modem(drv); |
| return IRQ_HANDLED; |
| } |
| |
| static int __devinit |
| pil_q6v4_proc_init(struct q6v4_data *drv, struct platform_device *pdev, int i) |
| { |
| static const char *name[2] = { "fw", "sw" }; |
| const struct pil_q6v4_pdata *pdata_p = pdev->dev.platform_data; |
| const struct pil_q6v4_pdata *pdata = pdata_p + i; |
| char reg_name[12]; |
| struct pil_desc *desc; |
| struct resource *res; |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 1 + (i * 2)); |
| if (!res) |
| return -EINVAL; |
| |
| drv->base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); |
| if (!drv->base) |
| return -ENOMEM; |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 2 + (i * 2)); |
| if (!res) |
| return -EINVAL; |
| |
| drv->wdog_base = devm_ioremap(&pdev->dev, res->start, |
| resource_size(res)); |
| if (!drv->wdog_base) |
| return -ENOMEM; |
| |
| snprintf(reg_name, sizeof(reg_name), "%s_core_vdd", name[i]); |
| drv->vreg = devm_regulator_get(&pdev->dev, reg_name); |
| if (IS_ERR(drv->vreg)) |
| return PTR_ERR(drv->vreg); |
| |
| drv->xo = devm_clk_get(&pdev->dev, "xo"); |
| if (IS_ERR(drv->xo)) |
| return PTR_ERR(drv->xo); |
| |
| desc = &drv->desc; |
| desc->name = pdata->name; |
| desc->depends_on = pdata->depends; |
| desc->dev = &pdev->dev; |
| desc->owner = THIS_MODULE; |
| desc->proxy_timeout = 10000; |
| pil_q6v4_init(drv, pdata); |
| |
| if (pas_supported(pdata->pas_id) > 0) { |
| desc->ops = &pil_q6v4_modem_ops_trusted; |
| dev_info(&pdev->dev, "using secure boot for %s\n", name[i]); |
| } else { |
| desc->ops = &pil_q6v4_modem_ops; |
| dev_info(&pdev->dev, "using non-secure boot for %s\n", name[i]); |
| } |
| return 0; |
| } |
| |
| static int __devinit pil_q6v4_modem_driver_probe(struct platform_device *pdev) |
| { |
| struct q6v4_data *drv_fw, *drv_sw; |
| struct q6v4_modem *drv; |
| struct resource *res; |
| struct regulator *pll_supply; |
| int ret; |
| const struct pil_q6v4_pdata *pdata = pdev->dev.platform_data; |
| |
| drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL); |
| if (!drv) |
| return -ENOMEM; |
| platform_set_drvdata(pdev, drv); |
| |
| drv_fw = &drv->q6_fw; |
| drv_sw = &drv->q6_sw; |
| |
| drv_fw->wdog_irq = platform_get_irq(pdev, 0); |
| if (drv_fw->wdog_irq < 0) |
| return drv_fw->wdog_irq; |
| |
| drv_sw->wdog_irq = platform_get_irq(pdev, 1); |
| if (drv_sw->wdog_irq < 0) |
| return drv_sw->wdog_irq; |
| |
| drv->loadable = !!pdata; /* No pdata = don't use PIL */ |
| if (drv->loadable) { |
| ret = pil_q6v4_proc_init(drv_fw, pdev, 0); |
| if (ret) |
| return ret; |
| |
| ret = pil_q6v4_proc_init(drv_sw, pdev, 1); |
| if (ret) |
| return ret; |
| |
| pll_supply = devm_regulator_get(&pdev->dev, "pll_vdd"); |
| drv_fw->pll_supply = drv_sw->pll_supply = pll_supply; |
| if (IS_ERR(pll_supply)) |
| return PTR_ERR(pll_supply); |
| |
| ret = regulator_set_voltage(pll_supply, 1800000, 1800000); |
| if (ret) { |
| dev_err(&pdev->dev, "failed to set pll voltage\n"); |
| return ret; |
| } |
| |
| ret = regulator_set_optimum_mode(pll_supply, 100000); |
| if (ret < 0) { |
| dev_err(&pdev->dev, "failed to set pll optimum mode\n"); |
| return ret; |
| } |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| if (!res) |
| return -EINVAL; |
| |
| drv->modem_base = devm_ioremap(&pdev->dev, res->start, |
| resource_size(res)); |
| if (!drv->modem_base) |
| return -ENOMEM; |
| |
| drv_fw->pil = msm_pil_register(&drv_fw->desc); |
| if (IS_ERR(drv_fw->pil)) |
| return PTR_ERR(drv_fw->pil); |
| |
| drv_sw->pil = msm_pil_register(&drv_sw->desc); |
| if (IS_ERR(drv_sw->pil)) { |
| ret = PTR_ERR(drv_sw->pil); |
| goto err_pil_sw; |
| } |
| } |
| |
| drv->subsys_desc.name = "modem"; |
| drv->subsys_desc.shutdown = modem_shutdown; |
| drv->subsys_desc.powerup = modem_powerup; |
| drv->subsys_desc.ramdump = modem_ramdump; |
| drv->subsys_desc.crash_shutdown = modem_crash_shutdown; |
| |
| drv->fw_ramdump_dev = create_ramdump_device("modem_fw"); |
| if (!drv->fw_ramdump_dev) { |
| ret = -ENOMEM; |
| goto err_fw_ramdump; |
| } |
| |
| drv->sw_ramdump_dev = create_ramdump_device("modem_sw"); |
| if (!drv->sw_ramdump_dev) { |
| ret = -ENOMEM; |
| goto err_sw_ramdump; |
| } |
| |
| drv->smem_ramdump_dev = create_ramdump_device("smem-modem"); |
| if (!drv->smem_ramdump_dev) { |
| ret = -ENOMEM; |
| goto err_smem_ramdump; |
| } |
| |
| drv->subsys = subsys_register(&drv->subsys_desc); |
| if (IS_ERR(drv->subsys)) { |
| ret = PTR_ERR(drv->subsys); |
| goto err_subsys; |
| } |
| |
| ret = devm_request_irq(&pdev->dev, drv_fw->wdog_irq, |
| modem_wdog_bite_irq, IRQF_TRIGGER_RISING, |
| dev_name(&pdev->dev), drv); |
| if (ret) |
| goto err_irq; |
| |
| ret = devm_request_irq(&pdev->dev, drv_sw->wdog_irq, |
| modem_wdog_bite_irq, IRQF_TRIGGER_RISING, |
| dev_name(&pdev->dev), drv); |
| if (ret) |
| goto err_irq; |
| |
| ret = smsm_state_cb_register(SMSM_MODEM_STATE, SMSM_RESET, |
| smsm_state_cb, drv); |
| if (ret) |
| goto err_irq; |
| return 0; |
| |
| err_irq: |
| subsys_unregister(drv->subsys); |
| err_subsys: |
| destroy_ramdump_device(drv->smem_ramdump_dev); |
| err_smem_ramdump: |
| destroy_ramdump_device(drv->sw_ramdump_dev); |
| err_sw_ramdump: |
| destroy_ramdump_device(drv->fw_ramdump_dev); |
| err_fw_ramdump: |
| if (drv->loadable) |
| msm_pil_unregister(drv_sw->pil); |
| err_pil_sw: |
| msm_pil_unregister(drv_fw->pil); |
| return ret; |
| } |
| |
| static int __devexit pil_q6v4_modem_driver_exit(struct platform_device *pdev) |
| { |
| struct q6v4_modem *drv = platform_get_drvdata(pdev); |
| |
| smsm_state_cb_deregister(SMSM_MODEM_STATE, SMSM_RESET, |
| smsm_state_cb, drv); |
| subsys_unregister(drv->subsys); |
| destroy_ramdump_device(drv->smem_ramdump_dev); |
| destroy_ramdump_device(drv->sw_ramdump_dev); |
| destroy_ramdump_device(drv->fw_ramdump_dev); |
| if (drv->loadable) { |
| msm_pil_unregister(drv->q6_sw.pil); |
| msm_pil_unregister(drv->q6_fw.pil); |
| } |
| return 0; |
| } |
| |
| static struct platform_driver pil_q6v4_modem_driver = { |
| .probe = pil_q6v4_modem_driver_probe, |
| .remove = __devexit_p(pil_q6v4_modem_driver_exit), |
| .driver = { |
| .name = "pil-q6v4-modem", |
| .owner = THIS_MODULE, |
| }, |
| }; |
| |
| static int __init pil_q6v4_modem_init(void) |
| { |
| return platform_driver_register(&pil_q6v4_modem_driver); |
| } |
| module_init(pil_q6v4_modem_init); |
| |
| static void __exit pil_q6v4_modem_exit(void) |
| { |
| platform_driver_unregister(&pil_q6v4_modem_driver); |
| } |
| module_exit(pil_q6v4_modem_exit); |
| |
| MODULE_DESCRIPTION("Support for booting QDSP6v4 (Hexagon) processors"); |
| MODULE_LICENSE("GPL v2"); |