| /* |
| * Copyright (c) 2012, Code Aurora Forum. 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/io.h> |
| #include <linux/iopoll.h> |
| #include <linux/err.h> |
| #include <linux/of.h> |
| #include <linux/clk.h> |
| #include <mach/clk.h> |
| #include "peripheral-loader.h" |
| #include "pil-q6v5.h" |
| |
| /* QDSP6SS Register Offsets */ |
| #define QDSP6SS_RESET 0x014 |
| #define QDSP6SS_GFMUX_CTL 0x020 |
| #define QDSP6SS_PWR_CTL 0x030 |
| #define QDSP6SS_CGC_OVERRIDE 0x034 |
| |
| /* AXI Halt Register Offsets */ |
| #define AXI_HALTREQ 0x0 |
| #define AXI_HALTACK 0x4 |
| #define AXI_IDLE 0x8 |
| |
| #define HALT_ACK_TIMEOUT_US 100000 |
| |
| /* QDSP6SS_RESET */ |
| #define Q6SS_STOP_CORE BIT(0) |
| #define Q6SS_CORE_ARES BIT(1) |
| #define Q6SS_BUS_ARES_ENA BIT(2) |
| |
| /* QDSP6SS_GFMUX_CTL */ |
| #define Q6SS_CLK_ENA BIT(1) |
| |
| /* QDSP6SS_PWR_CTL */ |
| #define Q6SS_L2DATA_SLP_NRET_N (BIT(0)|BIT(1)|BIT(2)) |
| #define Q6SS_L2TAG_SLP_NRET_N BIT(16) |
| #define Q6SS_ETB_SLP_NRET_N BIT(17) |
| #define Q6SS_L2DATA_STBY_N BIT(18) |
| #define Q6SS_SLP_RET_N BIT(19) |
| #define Q6SS_CLAMP_IO BIT(20) |
| #define QDSS_BHS_ON BIT(21) |
| |
| /* QDSP6SS_CGC_OVERRIDE */ |
| #define Q6SS_CORE_CLK_EN BIT(0) |
| #define Q6SS_CORE_RCLK_EN BIT(1) |
| |
| int pil_q6v5_make_proxy_votes(struct pil_desc *pil) |
| { |
| int ret; |
| struct q6v5_data *drv = container_of(pil, struct q6v5_data, desc); |
| |
| ret = clk_prepare_enable(drv->xo); |
| if (ret) { |
| dev_err(pil->dev, "Failed to enable XO\n"); |
| return ret; |
| } |
| return 0; |
| } |
| EXPORT_SYMBOL(pil_q6v5_make_proxy_votes); |
| |
| void pil_q6v5_remove_proxy_votes(struct pil_desc *pil) |
| { |
| struct q6v5_data *drv = container_of(pil, struct q6v5_data, desc); |
| clk_disable_unprepare(drv->xo); |
| } |
| EXPORT_SYMBOL(pil_q6v5_remove_proxy_votes); |
| |
| void pil_q6v5_halt_axi_port(struct pil_desc *pil, void __iomem *halt_base) |
| { |
| int ret; |
| u32 status; |
| |
| /* Assert halt request */ |
| writel_relaxed(1, halt_base + AXI_HALTREQ); |
| |
| /* Wait for halt */ |
| ret = readl_poll_timeout(halt_base + AXI_HALTACK, |
| status, status != 0, 50, HALT_ACK_TIMEOUT_US); |
| if (ret) |
| dev_warn(pil->dev, "Port %p halt timeout\n", halt_base); |
| else if (!readl_relaxed(halt_base + AXI_IDLE)) |
| dev_warn(pil->dev, "Port %p halt failed\n", halt_base); |
| |
| /* Clear halt request (port will remain halted until reset) */ |
| writel_relaxed(0, halt_base + AXI_HALTREQ); |
| } |
| EXPORT_SYMBOL(pil_q6v5_halt_axi_port); |
| |
| void pil_q6v5_shutdown(struct pil_desc *pil) |
| { |
| u32 val; |
| struct q6v5_data *drv = container_of(pil, struct q6v5_data, desc); |
| |
| /* Turn off core clock */ |
| val = readl_relaxed(drv->reg_base + QDSP6SS_GFMUX_CTL); |
| val &= ~Q6SS_CLK_ENA; |
| writel_relaxed(val, drv->reg_base + QDSP6SS_GFMUX_CTL); |
| |
| /* Clamp IO */ |
| val = readl_relaxed(drv->reg_base + QDSP6SS_PWR_CTL); |
| val |= Q6SS_CLAMP_IO; |
| writel_relaxed(val, drv->reg_base + QDSP6SS_PWR_CTL); |
| |
| /* Turn off Q6 memories */ |
| val &= ~(Q6SS_L2DATA_SLP_NRET_N | Q6SS_SLP_RET_N | |
| Q6SS_L2TAG_SLP_NRET_N | Q6SS_ETB_SLP_NRET_N | |
| Q6SS_L2DATA_STBY_N); |
| writel_relaxed(Q6SS_CLAMP_IO, drv->reg_base + QDSP6SS_PWR_CTL); |
| |
| /* Assert Q6 resets */ |
| val = readl_relaxed(drv->reg_base + QDSP6SS_RESET); |
| val = (Q6SS_CORE_ARES | Q6SS_BUS_ARES_ENA); |
| writel_relaxed(val, drv->reg_base + QDSP6SS_RESET); |
| |
| /* Kill power at block headswitch (affects LPASS only) */ |
| val = readl_relaxed(drv->reg_base + QDSP6SS_PWR_CTL); |
| val &= ~QDSS_BHS_ON; |
| writel_relaxed(val, drv->reg_base + QDSP6SS_PWR_CTL); |
| } |
| EXPORT_SYMBOL(pil_q6v5_shutdown); |
| |
| int pil_q6v5_reset(struct pil_desc *pil) |
| { |
| struct q6v5_data *drv = container_of(pil, struct q6v5_data, desc); |
| u32 val; |
| |
| /* Assert resets, stop core */ |
| val = readl_relaxed(drv->reg_base + QDSP6SS_RESET); |
| val |= (Q6SS_CORE_ARES | Q6SS_BUS_ARES_ENA | Q6SS_STOP_CORE); |
| writel_relaxed(val, drv->reg_base + QDSP6SS_RESET); |
| |
| /* Enable power block headswitch (only affects LPASS) */ |
| val = readl_relaxed(drv->reg_base + QDSP6SS_PWR_CTL); |
| val |= QDSS_BHS_ON; |
| writel_relaxed(val, drv->reg_base + QDSP6SS_PWR_CTL); |
| |
| /* Turn on memories */ |
| val = readl_relaxed(drv->reg_base + QDSP6SS_PWR_CTL); |
| val |= Q6SS_L2DATA_SLP_NRET_N | Q6SS_SLP_RET_N | |
| Q6SS_L2TAG_SLP_NRET_N | Q6SS_ETB_SLP_NRET_N | |
| Q6SS_L2DATA_STBY_N; |
| writel_relaxed(val, drv->reg_base + QDSP6SS_PWR_CTL); |
| |
| /* Remove IO clamp */ |
| val &= ~Q6SS_CLAMP_IO; |
| writel_relaxed(val, drv->reg_base + QDSP6SS_PWR_CTL); |
| |
| /* Bring core out of reset */ |
| val = readl_relaxed(drv->reg_base + QDSP6SS_RESET); |
| val &= ~Q6SS_CORE_ARES; |
| writel_relaxed(val, drv->reg_base + QDSP6SS_RESET); |
| |
| /* Disable clock gating for core and rclk */ |
| val = readl_relaxed(drv->reg_base + QDSP6SS_CGC_OVERRIDE); |
| val |= Q6SS_CORE_RCLK_EN | Q6SS_CORE_CLK_EN; |
| writel_relaxed(val, drv->reg_base + QDSP6SS_CGC_OVERRIDE); |
| |
| /* Turn on core clock */ |
| val = readl_relaxed(drv->reg_base + QDSP6SS_GFMUX_CTL); |
| val |= Q6SS_CLK_ENA; |
| writel_relaxed(val, drv->reg_base + QDSP6SS_GFMUX_CTL); |
| |
| /* Start core execution */ |
| val = readl_relaxed(drv->reg_base + QDSP6SS_RESET); |
| val &= ~Q6SS_STOP_CORE; |
| writel_relaxed(val, drv->reg_base + QDSP6SS_RESET); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(pil_q6v5_reset); |
| |
| struct q6v5_data __devinit *pil_q6v5_init(struct platform_device *pdev) |
| { |
| struct q6v5_data *drv; |
| struct resource *res; |
| struct pil_desc *desc; |
| int ret; |
| |
| drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL); |
| if (!drv) |
| return ERR_PTR(-ENOMEM); |
| |
| res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "qdsp6_base"); |
| drv->reg_base = devm_request_and_ioremap(&pdev->dev, res); |
| if (!drv->reg_base) |
| return ERR_PTR(-ENOMEM); |
| |
| res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "halt_base"); |
| drv->axi_halt_base = devm_ioremap(&pdev->dev, res->start, |
| resource_size(res)); |
| if (!drv->axi_halt_base) |
| return ERR_PTR(-ENOMEM); |
| |
| desc = &drv->desc; |
| ret = of_property_read_string(pdev->dev.of_node, "qcom,firmware-name", |
| &desc->name); |
| if (ret) |
| return ERR_PTR(ret); |
| |
| drv->xo = devm_clk_get(&pdev->dev, "xo"); |
| if (IS_ERR(drv->xo)) |
| return ERR_CAST(drv->xo); |
| |
| desc->dev = &pdev->dev; |
| |
| return drv; |
| } |
| EXPORT_SYMBOL(pil_q6v5_init); |