From patchwork Sat Oct 7 02:34:02 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuppuswamy Sathyanarayanan X-Patchwork-Id: 9991099 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 2B5E260244 for ; Sat, 7 Oct 2017 02:35:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1D22728D88 for ; Sat, 7 Oct 2017 02:35:22 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 11DDD28D9D; Sat, 7 Oct 2017 02:35:22 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7609528D88 for ; Sat, 7 Oct 2017 02:35:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752568AbdJGCfF (ORCPT ); Fri, 6 Oct 2017 22:35:05 -0400 Received: from mga09.intel.com ([134.134.136.24]:35038 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753264AbdJGCeZ (ORCPT ); Fri, 6 Oct 2017 22:34:25 -0400 Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 06 Oct 2017 19:34:21 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.42,486,1500966000"; d="scan'208";a="136102079" Received: from skuppusw-desk.jf.intel.com ([10.7.198.92]) by orsmga004.jf.intel.com with ESMTP; 06 Oct 2017 19:34:20 -0700 From: sathyanarayanan.kuppuswamy@linux.intel.com To: a.zummo@towertech.it, x86@kernel.org, wim@iguana.be, mingo@redhat.com, alexandre.belloni@free-electrons.com, qipeng.zha@intel.com, hpa@zytor.com, dvhart@infradead.org, tglx@linutronix.de, lee.jones@linaro.org, andy@infradead.org, souvik.k.chakravarty@intel.com Cc: linux-rtc@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org, sathyaosid@gmail.com, Kuppuswamy Sathyanarayanan Subject: [RFC v4 8/8] platform/x86: intel_scu_ipc: Use generic Intel IPC device calls Date: Fri, 6 Oct 2017 19:34:02 -0700 Message-Id: <4f783486f22b9cefce4744c3e99bb0efc7480c0f.1507340643.git.sathyanarayanan.kuppuswamy@linux.intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: References: Sender: platform-driver-x86-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Kuppuswamy Sathyanarayanan Removed redundant IPC helper functions and refactored the driver to use generic IPC device driver APIs. This patch also cleans-up SCU IPC user drivers(rtc-mrst.c, intel-mid_wdt.c, intel-mid_wdt.c, intel-mid.c) to use APIs provided by generic IPC driver. Signed-off-by: Kuppuswamy Sathyanarayanan Acked-by: Alexandre Belloni --- arch/x86/include/asm/intel_scu_ipc.h | 23 +- arch/x86/platform/intel-mid/intel-mid.c | 15 +- drivers/platform/x86/Kconfig | 1 + drivers/platform/x86/intel_scu_ipc.c | 483 +++++++++++++------------------- drivers/rtc/rtc-mrst.c | 16 +- drivers/watchdog/intel-mid_wdt.c | 12 +- drivers/watchdog/intel_scu_watchdog.c | 18 +- 7 files changed, 256 insertions(+), 312 deletions(-) Changes since v3: * Added intel_ipc_dev_put() support. diff --git a/arch/x86/include/asm/intel_scu_ipc.h b/arch/x86/include/asm/intel_scu_ipc.h index 81d3d87..5842534 100644 --- a/arch/x86/include/asm/intel_scu_ipc.h +++ b/arch/x86/include/asm/intel_scu_ipc.h @@ -14,9 +14,19 @@ #define IPCMSG_COLD_BOOT 0xF3 #define IPCMSG_VRTC 0xFA /* Set vRTC device */ - /* Command id associated with message IPCMSG_VRTC */ - #define IPC_CMD_VRTC_SETTIME 1 /* Set time */ - #define IPC_CMD_VRTC_SETALARM 2 /* Set alarm */ + +/* Command id associated with message IPCMSG_VRTC */ +#define IPC_CMD_VRTC_SETTIME 1 /* Set time */ +#define IPC_CMD_VRTC_SETALARM 2 /* Set alarm */ + +#define INTEL_SCU_IPC_DEV "intel_scu_ipc" +#define SCU_PARAM_LEN 2 + +static inline void scu_cmd_init(u32 *cmd, u32 param1, u32 param2) +{ + cmd[0] = param1; + cmd[1] = param2; +} /* Read single register */ int intel_scu_ipc_ioread8(u16 addr, u8 *data); @@ -45,13 +55,6 @@ int intel_scu_ipc_writev(u16 *addr, u8 *data, int len); /* Update single register based on the mask */ int intel_scu_ipc_update_register(u16 addr, u8 data, u8 mask); -/* Issue commands to the SCU with or without data */ -int intel_scu_ipc_simple_command(int cmd, int sub); -int intel_scu_ipc_command(int cmd, int sub, u32 *in, int inlen, - u32 *out, int outlen); -int intel_scu_ipc_raw_command(int cmd, int sub, u8 *in, int inlen, - u32 *out, int outlen, u32 dptr, u32 sptr); - /* I2C control api */ int intel_scu_ipc_i2c_cntrl(u32 addr, u32 *data); diff --git a/arch/x86/platform/intel-mid/intel-mid.c b/arch/x86/platform/intel-mid/intel-mid.c index 86676ce..23b3ab3 100644 --- a/arch/x86/platform/intel-mid/intel-mid.c +++ b/arch/x86/platform/intel-mid/intel-mid.c @@ -22,6 +22,7 @@ #include #include #include +#include #include #include @@ -70,16 +71,26 @@ EXPORT_SYMBOL_GPL(__intel_mid_cpu_chip); static void intel_mid_power_off(void) { + struct intel_ipc_dev *ipc_dev; + u32 cmds[SCU_PARAM_LEN] = {IPCMSG_COLD_OFF, 1}; + /* Shut down South Complex via PWRMU */ intel_mid_pwr_power_off(); + ipc_dev = intel_ipc_dev_get(INTEL_SCU_IPC_DEV); /* Only for Tangier, the rest will ignore this command */ - intel_scu_ipc_simple_command(IPCMSG_COLD_OFF, 1); + ipc_dev_simple_cmd(ipc_dev, cmds, SCU_PARAM_LEN); + intel_ipc_dev_put(ipc_dev); }; static void intel_mid_reboot(void) { - intel_scu_ipc_simple_command(IPCMSG_COLD_BOOT, 0); + struct intel_ipc_dev *ipc_dev; + u32 cmds[SCU_PARAM_LEN] = {IPCMSG_COLD_BOOT, 0}; + + ipc_dev = intel_ipc_dev_get(INTEL_SCU_IPC_DEV); + ipc_dev_simple_cmd(ipc_dev, cmds, SCU_PARAM_LEN); + intel_ipc_dev_put(ipc_dev); } static unsigned long __init intel_mid_calibrate_tsc(void) diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index 9442c23..1b9093c 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -863,6 +863,7 @@ config INTEL_VBTN config INTEL_SCU_IPC bool "Intel SCU IPC Support" depends on X86_INTEL_MID + select REGMAP_MMIO default y ---help--- IPC is used to bridge the communications between kernel and SCU on diff --git a/drivers/platform/x86/intel_scu_ipc.c b/drivers/platform/x86/intel_scu_ipc.c index 2c85f75..8812202 100644 --- a/drivers/platform/x86/intel_scu_ipc.c +++ b/drivers/platform/x86/intel_scu_ipc.c @@ -24,6 +24,8 @@ #include #include #include +#include +#include #include #include @@ -39,6 +41,25 @@ #define IPC_CMD_PCNTRL_R 1 /* Register read */ #define IPC_CMD_PCNTRL_M 2 /* Register read-modify-write */ +/* IPC dev register offsets */ +/* + * IPC Read Buffer (Read Only): + * 16 byte buffer for receiving data from SCU, if IPC command + * processing results in response data + */ +#define IPC_DEV_SCU_RBUF_OFFSET 0x90 +#define IPC_DEV_SCU_WRBUF_OFFSET 0x80 +#define IPC_DEV_SCU_SPTR_OFFSET 0x08 +#define IPC_DEV_SCU_DPTR_OFFSET 0x0C +#define IPC_DEV_SCU_STATUS_OFFSET 0x04 + +/* IPC dev commands */ +/* IPC command register IOC bit */ +#define IPC_DEV_SCU_CMD_MSI BIT(8) +#define IPC_DEV_SCU_CMD_STATUS_ERR BIT(1) +#define IPC_DEV_SCU_CMD_STATUS_ERR_MASK GENMASK(7, 0) +#define IPC_DEV_SCU_CMD_STATUS_BUSY BIT(0) + /* * IPC register summary * @@ -59,6 +80,11 @@ #define IPC_WWBUF_SIZE 20 /* IPC Write buffer Size */ #define IPC_RWBUF_SIZE 20 /* IPC Read buffer Size */ #define IPC_IOC 0x100 /* IPC command register IOC bit */ +#define IPC_CMD_SIZE 16 +#define IPC_CMD_SUBCMD 12 +#define IPC_RWBUF_SIZE_DWORD 5 +#define IPC_WWBUF_SIZE_DWORD 5 + #define PCI_DEVICE_ID_LINCROFT 0x082a #define PCI_DEVICE_ID_PENWELL 0x080e @@ -93,140 +119,49 @@ static const struct intel_scu_ipc_pdata_t intel_scu_ipc_tangier_pdata = { struct intel_scu_ipc_dev { struct device *dev; + struct intel_ipc_dev *ipc_dev; void __iomem *ipc_base; void __iomem *i2c_base; - struct completion cmd_complete; + struct regmap *ipc_regs; + struct regmap *i2c_regs; u8 irq_mode; }; -static struct intel_scu_ipc_dev ipcdev; /* Only one for now */ +static struct regmap_config ipc_regmap_config = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, +}; -/* - * IPC Read Buffer (Read Only): - * 16 byte buffer for receiving data from SCU, if IPC command - * processing results in response data - */ -#define IPC_READ_BUFFER 0x90 +static struct regmap_config i2c_regmap_config = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .fast_io = true, +}; + +static struct intel_scu_ipc_dev ipcdev; /* Only one for now */ #define IPC_I2C_CNTRL_ADDR 0 #define I2C_DATA_ADDR 0x04 -static DEFINE_MUTEX(ipclock); /* lock used to prevent multiple call to SCU */ - -/* - * Send ipc command - * Command Register (Write Only): - * A write to this register results in an interrupt to the SCU core processor - * Format: - * |rfu2(8) | size(8) | command id(4) | rfu1(3) | ioc(1) | command(8)| - */ -static inline void ipc_command(struct intel_scu_ipc_dev *scu, u32 cmd) -{ - if (scu->irq_mode) { - reinit_completion(&scu->cmd_complete); - writel(cmd | IPC_IOC, scu->ipc_base); - } - writel(cmd, scu->ipc_base); -} - -/* - * Write ipc data - * IPC Write Buffer (Write Only): - * 16-byte buffer for sending data associated with IPC command to - * SCU. Size of the data is specified in the IPC_COMMAND_REG register - */ -static inline void ipc_data_writel(struct intel_scu_ipc_dev *scu, u32 data, u32 offset) -{ - writel(data, scu->ipc_base + 0x80 + offset); -} - -/* - * Status Register (Read Only): - * Driver will read this register to get the ready/busy status of the IPC - * block and error status of the IPC command that was just processed by SCU - * Format: - * |rfu3(8)|error code(8)|initiator id(8)|cmd id(4)|rfu1(2)|error(1)|busy(1)| - */ -static inline u8 ipc_read_status(struct intel_scu_ipc_dev *scu) -{ - return __raw_readl(scu->ipc_base + 0x04); -} - -/* Read ipc byte data */ -static inline u8 ipc_data_readb(struct intel_scu_ipc_dev *scu, u32 offset) -{ - return readb(scu->ipc_base + IPC_READ_BUFFER + offset); -} - -/* Read ipc u32 data */ -static inline u32 ipc_data_readl(struct intel_scu_ipc_dev *scu, u32 offset) -{ - return readl(scu->ipc_base + IPC_READ_BUFFER + offset); -} - -/* Wait till scu status is busy */ -static inline int busy_loop(struct intel_scu_ipc_dev *scu) -{ - u32 status = ipc_read_status(scu); - u32 loop_count = 100000; - - /* break if scu doesn't reset busy bit after huge retry */ - while ((status & BIT(0)) && --loop_count) { - udelay(1); /* scu processing time is in few u secods */ - status = ipc_read_status(scu); - } - - if (status & BIT(0)) { - dev_err(scu->dev, "IPC timed out"); - return -ETIMEDOUT; - } - - if (status & BIT(1)) - return -EIO; - - return 0; -} - -/* Wait till ipc ioc interrupt is received or timeout in 3 HZ */ -static inline int ipc_wait_for_interrupt(struct intel_scu_ipc_dev *scu) -{ - int status; - - if (!wait_for_completion_timeout(&scu->cmd_complete, 3 * HZ)) { - dev_err(scu->dev, "IPC timed out\n"); - return -ETIMEDOUT; - } - - status = ipc_read_status(scu); - if (status & BIT(1)) - return -EIO; - - return 0; -} - -static int intel_scu_ipc_check_status(struct intel_scu_ipc_dev *scu) -{ - return scu->irq_mode ? ipc_wait_for_interrupt(scu) : busy_loop(scu); -} - /* Read/Write power control(PMIC in Langwell, MSIC in PenWell) registers */ static int pwr_reg_rdwr(u16 *addr, u8 *data, u32 count, u32 op, u32 id) { struct intel_scu_ipc_dev *scu = &ipcdev; int nc; u32 offset = 0; - int err; + int err = -EIO; u8 cbuf[IPC_WWBUF_SIZE]; u32 *wbuf = (u32 *)&cbuf; + u32 cmd[SCU_PARAM_LEN] = {0}; + /* max rbuf size is 20 bytes */ + u8 rbuf[IPC_RWBUF_SIZE] = {0}; + u32 rbuflen = DIV_ROUND_UP(count, 4); memset(cbuf, 0, sizeof(cbuf)); - mutex_lock(&ipclock); - - if (scu->dev == NULL) { - mutex_unlock(&ipclock); - return -ENODEV; - } + scu_cmd_init(cmd, op, id); for (nc = 0; nc < count; nc++, offset += 2) { cbuf[offset] = addr[nc]; @@ -234,30 +169,30 @@ static int pwr_reg_rdwr(u16 *addr, u8 *data, u32 count, u32 op, u32 id) } if (id == IPC_CMD_PCNTRL_R) { - for (nc = 0, offset = 0; nc < count; nc++, offset += 4) - ipc_data_writel(scu, wbuf[nc], offset); - ipc_command(scu, (count * 2) << 16 | id << 12 | 0 << 8 | op); + err = ipc_dev_raw_cmd(scu->ipc_dev, cmd, SCU_PARAM_LEN, + (u8 *)wbuf, count * 2, (u32 *)rbuf, + IPC_RWBUF_SIZE_DWORD, 0, 0); } else if (id == IPC_CMD_PCNTRL_W) { for (nc = 0; nc < count; nc++, offset += 1) cbuf[offset] = data[nc]; - for (nc = 0, offset = 0; nc < count; nc++, offset += 4) - ipc_data_writel(scu, wbuf[nc], offset); - ipc_command(scu, (count * 3) << 16 | id << 12 | 0 << 8 | op); + err = ipc_dev_raw_cmd(scu->ipc_dev, cmd, SCU_PARAM_LEN, + (u8 *)wbuf, count * 3, NULL, 0, 0, 0); + } else if (id == IPC_CMD_PCNTRL_M) { cbuf[offset] = data[0]; cbuf[offset + 1] = data[1]; - ipc_data_writel(scu, wbuf[0], 0); /* Write wbuff */ - ipc_command(scu, 4 << 16 | id << 12 | 0 << 8 | op); + err = ipc_dev_raw_cmd(scu->ipc_dev, cmd, SCU_PARAM_LEN, + (u8 *)wbuf, 4, NULL, 0, 0, 0); } - err = intel_scu_ipc_check_status(scu); if (!err && id == IPC_CMD_PCNTRL_R) { /* Read rbuf */ /* Workaround: values are read as 0 without memcpy_fromio */ memcpy_fromio(cbuf, scu->ipc_base + 0x90, 16); - for (nc = 0; nc < count; nc++) - data[nc] = ipc_data_readb(scu, nc); + regmap_bulk_read(scu->ipc_regs, IPC_DEV_SCU_RBUF_OFFSET, + rbuf, rbuflen); + memcpy(data, rbuf, count); } - mutex_unlock(&ipclock); + return err; } @@ -422,138 +357,6 @@ int intel_scu_ipc_update_register(u16 addr, u8 bits, u8 mask) } EXPORT_SYMBOL(intel_scu_ipc_update_register); -/** - * intel_scu_ipc_simple_command - send a simple command - * @cmd: command - * @sub: sub type - * - * Issue a simple command to the SCU. Do not use this interface if - * you must then access data as any data values may be overwritten - * by another SCU access by the time this function returns. - * - * This function may sleep. Locking for SCU accesses is handled for - * the caller. - */ -int intel_scu_ipc_simple_command(int cmd, int sub) -{ - struct intel_scu_ipc_dev *scu = &ipcdev; - int err; - - mutex_lock(&ipclock); - if (scu->dev == NULL) { - mutex_unlock(&ipclock); - return -ENODEV; - } - ipc_command(scu, sub << 12 | cmd); - err = intel_scu_ipc_check_status(scu); - mutex_unlock(&ipclock); - return err; -} -EXPORT_SYMBOL(intel_scu_ipc_simple_command); - -/** - * intel_scu_ipc_command - command with data - * @cmd: command - * @sub: sub type - * @in: input data - * @inlen: input length in dwords - * @out: output data - * @outlein: output length in dwords - * - * Issue a command to the SCU which involves data transfers. Do the - * data copies under the lock but leave it for the caller to interpret - */ -int intel_scu_ipc_command(int cmd, int sub, u32 *in, int inlen, - u32 *out, int outlen) -{ - struct intel_scu_ipc_dev *scu = &ipcdev; - int i, err; - - mutex_lock(&ipclock); - if (scu->dev == NULL) { - mutex_unlock(&ipclock); - return -ENODEV; - } - - for (i = 0; i < inlen; i++) - ipc_data_writel(scu, *in++, 4 * i); - - ipc_command(scu, (inlen << 16) | (sub << 12) | cmd); - err = intel_scu_ipc_check_status(scu); - - if (!err) { - for (i = 0; i < outlen; i++) - *out++ = ipc_data_readl(scu, 4 * i); - } - - mutex_unlock(&ipclock); - return err; -} -EXPORT_SYMBOL(intel_scu_ipc_command); - -#define IPC_SPTR 0x08 -#define IPC_DPTR 0x0C - -/** - * intel_scu_ipc_raw_command() - IPC command with data and pointers - * @cmd: IPC command code. - * @sub: IPC command sub type. - * @in: input data of this IPC command. - * @inlen: input data length in dwords. - * @out: output data of this IPC command. - * @outlen: output data length in dwords. - * @sptr: data writing to SPTR register. - * @dptr: data writing to DPTR register. - * - * Send an IPC command to SCU with input/output data and source/dest pointers. - * - * Return: an IPC error code or 0 on success. - */ -int intel_scu_ipc_raw_command(int cmd, int sub, u8 *in, int inlen, - u32 *out, int outlen, u32 dptr, u32 sptr) -{ - struct intel_scu_ipc_dev *scu = &ipcdev; - int inbuflen = DIV_ROUND_UP(inlen, 4); - u32 inbuf[4]; - int i, err; - - /* Up to 16 bytes */ - if (inbuflen > 4) - return -EINVAL; - - mutex_lock(&ipclock); - if (scu->dev == NULL) { - mutex_unlock(&ipclock); - return -ENODEV; - } - - writel(dptr, scu->ipc_base + IPC_DPTR); - writel(sptr, scu->ipc_base + IPC_SPTR); - - /* - * SRAM controller doesn't support 8-bit writes, it only - * supports 32-bit writes, so we have to copy input data into - * the temporary buffer, and SCU FW will use the inlen to - * determine the actual input data length in the temporary - * buffer. - */ - memcpy(inbuf, in, inlen); - - for (i = 0; i < inbuflen; i++) - ipc_data_writel(scu, inbuf[i], 4 * i); - - ipc_command(scu, (inlen << 16) | (sub << 12) | cmd); - err = intel_scu_ipc_check_status(scu); - if (!err) { - for (i = 0; i < outlen; i++) - *out++ = ipc_data_readl(scu, 4 * i); - } - - mutex_unlock(&ipclock); - return err; -} -EXPORT_SYMBOL_GPL(intel_scu_ipc_raw_command); - /* I2C commands */ #define IPC_I2C_WRITE 1 /* I2C Write command */ #define IPC_I2C_READ 2 /* I2C Read command */ @@ -575,48 +378,143 @@ int intel_scu_ipc_i2c_cntrl(u32 addr, u32 *data) struct intel_scu_ipc_dev *scu = &ipcdev; u32 cmd = 0; - mutex_lock(&ipclock); - if (scu->dev == NULL) { - mutex_unlock(&ipclock); - return -ENODEV; - } cmd = (addr >> 24) & 0xFF; if (cmd == IPC_I2C_READ) { - writel(addr, scu->i2c_base + IPC_I2C_CNTRL_ADDR); + regmap_write(scu->i2c_regs, IPC_I2C_CNTRL_ADDR, addr); /* Write not getting updated without delay */ mdelay(1); - *data = readl(scu->i2c_base + I2C_DATA_ADDR); + regmap_read(scu->i2c_regs, I2C_DATA_ADDR, data); } else if (cmd == IPC_I2C_WRITE) { - writel(*data, scu->i2c_base + I2C_DATA_ADDR); + regmap_write(scu->i2c_regs, I2C_DATA_ADDR, *data); mdelay(1); - writel(addr, scu->i2c_base + IPC_I2C_CNTRL_ADDR); + regmap_write(scu->i2c_regs, IPC_I2C_CNTRL_ADDR, addr); } else { dev_err(scu->dev, "intel_scu_ipc: I2C INVALID_CMD = 0x%x\n", cmd); - mutex_unlock(&ipclock); return -EIO; } - mutex_unlock(&ipclock); return 0; } EXPORT_SYMBOL(intel_scu_ipc_i2c_cntrl); -/* - * Interrupt handler gets called when ioc bit of IPC_COMMAND_REG set to 1 - * When ioc bit is set to 1, caller api must wait for interrupt handler called - * which in turn unlocks the caller api. Currently this is not used - * - * This is edge triggered so we need take no action to clear anything - */ -static irqreturn_t ioc(int irq, void *dev_id) +static int pre_simple_cmd_fn(u32 *cmd_list, u32 cmdlen) { - struct intel_scu_ipc_dev *scu = dev_id; + if (!cmd_list || cmdlen != SCU_PARAM_LEN) + return -EINVAL; - if (scu->irq_mode) - complete(&scu->cmd_complete); + cmd_list[0] |= (cmd_list[1] << IPC_CMD_SUBCMD); - return IRQ_HANDLED; + return 0; +} + +static int pre_cmd_fn(u32 *cmd_list, u32 cmdlen, u32 *in, u32 inlen, + u32 *out, u32 outlen) +{ + int ret; + + if (inlen > IPC_WWBUF_SIZE_DWORD || outlen > IPC_RWBUF_SIZE_DWORD) + return -EINVAL; + + ret = pre_simple_cmd_fn(cmd_list, cmdlen); + if (ret < 0) + return ret; + + cmd_list[0] |= (inlen << IPC_CMD_SIZE); + + return 0; +} + +static int pre_raw_cmd_fn(u32 *cmd_list, u32 cmdlen, u8 *in, u32 inlen, + u32 *out, u32 outlen, u32 dptr, u32 sptr) +{ + int ret; + + if (inlen > IPC_WWBUF_SIZE || outlen > IPC_RWBUF_SIZE_DWORD) + return -EINVAL; + + ret = pre_simple_cmd_fn(cmd_list, cmdlen); + if (ret < 0) + return ret; + + cmd_list[0] |= (inlen << IPC_CMD_SIZE); + + return 0; +} + +static int scu_ipc_err_code(int status) +{ + if (status & IPC_DEV_SCU_CMD_STATUS_ERR) + return (status & IPC_DEV_SCU_CMD_STATUS_ERR_MASK); + else + return 0; +} + +static int scu_ipc_busy_check(int status) +{ + return status | IPC_DEV_SCU_CMD_STATUS_BUSY; +} + +static u32 scu_ipc_enable_msi(u32 cmd) +{ + return cmd | IPC_DEV_SCU_CMD_MSI; +} + +static struct intel_ipc_dev *intel_scu_ipc_dev_create( + struct device *dev, + void __iomem *base, + int irq) +{ + struct intel_ipc_dev_ops *ops; + struct intel_ipc_dev_cfg *cfg; + struct regmap *ipc_regs; + struct intel_scu_ipc_dev *scu = dev_get_drvdata(dev); + + cfg = devm_kzalloc(dev, sizeof(*cfg), GFP_KERNEL); + if (!cfg) + return ERR_PTR(-ENOMEM); + + ops = devm_kzalloc(dev, sizeof(*ops), GFP_KERNEL); + if (!ops) + return ERR_PTR(-ENOMEM); + + ipc_regs = devm_regmap_init_mmio_clk(dev, NULL, base, + &ipc_regmap_config); + if (IS_ERR(ipc_regs)) { + dev_err(dev, "ipc_regs regmap init failed\n"); + return ERR_CAST(ipc_regs);; + } + + scu->ipc_regs = ipc_regs; + + /* set IPC dev ops */ + ops->to_err_code = scu_ipc_err_code; + ops->busy_check = scu_ipc_busy_check; + ops->enable_msi = scu_ipc_enable_msi; + ops->pre_cmd_fn = pre_cmd_fn; + ops->pre_raw_cmd_fn = pre_raw_cmd_fn; + ops->pre_simple_cmd_fn = pre_simple_cmd_fn; + + /* set cfg options */ + if (scu->irq_mode) + cfg->mode = IPC_DEV_MODE_IRQ; + else + cfg->mode = IPC_DEV_MODE_POLLING; + + cfg->chan_type = IPC_CHANNEL_IA_SCU; + cfg->irq = irq; + cfg->use_msi = true; + cfg->support_sptr = true; + cfg->support_dptr = true; + cfg->cmd_regs = ipc_regs; + cfg->data_regs = ipc_regs; + cfg->wrbuf_reg = IPC_DEV_SCU_WRBUF_OFFSET; + cfg->rbuf_reg = IPC_DEV_SCU_RBUF_OFFSET; + cfg->sptr_reg = IPC_DEV_SCU_SPTR_OFFSET; + cfg->dptr_reg = IPC_DEV_SCU_DPTR_OFFSET; + cfg->status_reg = IPC_DEV_SCU_STATUS_OFFSET; + + return devm_intel_ipc_dev_create(dev, INTEL_SCU_IPC_DEV, cfg, ops); } /** @@ -650,25 +548,34 @@ static int ipc_probe(struct pci_dev *pdev, const struct pci_device_id *id) if (err) return err; - init_completion(&scu->cmd_complete); - scu->ipc_base = pcim_iomap_table(pdev)[0]; - scu->i2c_base = ioremap_nocache(pdata->i2c_base, pdata->i2c_len); + scu->i2c_base = devm_ioremap_nocache(&pdev->dev, pdata->i2c_base, + pdata->i2c_len); if (!scu->i2c_base) return -ENOMEM; - err = devm_request_irq(&pdev->dev, pdev->irq, ioc, 0, "intel_scu_ipc", - scu); - if (err) - return err; + pci_set_drvdata(pdev, scu); + + scu->i2c_regs = devm_regmap_init_mmio_clk(&pdev->dev, NULL, + scu->i2c_base, &i2c_regmap_config); + if (IS_ERR(scu->i2c_regs)) { + dev_err(&pdev->dev, "i2c_regs regmap init failed\n"); + return PTR_ERR(scu->i2c_regs);; + } + + scu->ipc_dev = intel_scu_ipc_dev_create(&pdev->dev, scu->ipc_base, + pdev->irq); + if (IS_ERR(scu->ipc_dev)) { + dev_err(&pdev->dev, "Failed to create SCU IPC device\n"); + return PTR_ERR(scu->ipc_dev); + } /* Assign device at last */ scu->dev = &pdev->dev; intel_scu_devices_create(); - pci_set_drvdata(pdev, scu); return 0; } diff --git a/drivers/rtc/rtc-mrst.c b/drivers/rtc/rtc-mrst.c index 7334c44..37595c4 100644 --- a/drivers/rtc/rtc-mrst.c +++ b/drivers/rtc/rtc-mrst.c @@ -36,6 +36,7 @@ #include #include #include +#include #include #include @@ -46,6 +47,7 @@ struct mrst_rtc { struct device *dev; int irq; struct resource *iomem; + struct intel_ipc_dev *ipc_dev; u8 enabled_wake; u8 suspend_ctrl; @@ -110,10 +112,11 @@ static int mrst_read_time(struct device *dev, struct rtc_time *time) static int mrst_set_time(struct device *dev, struct rtc_time *time) { - int ret; unsigned long flags; unsigned char mon, day, hrs, min, sec; unsigned int yrs; + struct mrst_rtc *mrst = dev_get_drvdata(dev); + u32 cmds[SCU_PARAM_LEN] = {IPCMSG_VRTC, IPC_CMD_VRTC_SETTIME}; yrs = time->tm_year; mon = time->tm_mon + 1; /* tm_mon starts at zero */ @@ -137,8 +140,7 @@ static int mrst_set_time(struct device *dev, struct rtc_time *time) spin_unlock_irqrestore(&rtc_lock, flags); - ret = intel_scu_ipc_simple_command(IPCMSG_VRTC, IPC_CMD_VRTC_SETTIME); - return ret; + return ipc_dev_simple_cmd(mrst->ipc_dev, cmds, SCU_PARAM_LEN); } static int mrst_read_alarm(struct device *dev, struct rtc_wkalrm *t) @@ -210,6 +212,7 @@ static int mrst_set_alarm(struct device *dev, struct rtc_wkalrm *t) struct mrst_rtc *mrst = dev_get_drvdata(dev); unsigned char hrs, min, sec; int ret = 0; + u32 cmds[SCU_PARAM_LEN] = {IPCMSG_VRTC, IPC_CMD_VRTC_SETALARM}; if (!mrst->irq) return -EIO; @@ -229,7 +232,7 @@ static int mrst_set_alarm(struct device *dev, struct rtc_wkalrm *t) spin_unlock_irq(&rtc_lock); - ret = intel_scu_ipc_simple_command(IPCMSG_VRTC, IPC_CMD_VRTC_SETALARM); + ret = ipc_dev_simple_cmd(mrst->ipc_dev, cmds, SCU_PARAM_LEN); if (ret) return ret; @@ -329,6 +332,10 @@ static int vrtc_mrst_do_probe(struct device *dev, struct resource *iomem, if (!iomem) return -ENODEV; + mrst_rtc.ipc_dev = intel_ipc_dev_get(INTEL_SCU_IPC_DEV); + if (IS_ERR_OR_NULL(mrst_rtc.ipc_dev)) + return PTR_ERR(mrst_rtc.ipc_dev); + iomem = request_mem_region(iomem->start, resource_size(iomem), driver_name); if (!iomem) { @@ -394,6 +401,7 @@ static void rtc_mrst_do_remove(struct device *dev) rtc_mrst_do_shutdown(); + intel_ipc_dev_put(mrst->ipc_dev); if (mrst->irq) free_irq(mrst->irq, mrst->rtc); diff --git a/drivers/watchdog/intel-mid_wdt.c b/drivers/watchdog/intel-mid_wdt.c index 72c108a..0d455bd 100644 --- a/drivers/watchdog/intel-mid_wdt.c +++ b/drivers/watchdog/intel-mid_wdt.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include @@ -29,6 +30,8 @@ #define MID_WDT_TIMEOUT_MAX 170 #define MID_WDT_DEFAULT_TIMEOUT 90 +static struct intel_ipc_dev *scu_ipc_dev; + /* SCU watchdog messages */ enum { SCU_WATCHDOG_START = 0, @@ -38,7 +41,10 @@ enum { static inline int wdt_command(int sub, u32 *in, int inlen) { - return intel_scu_ipc_command(IPC_WATCHDOG, sub, in, inlen, NULL, 0); + u32 cmds[SCU_PARAM_LEN] = {IPC_WATCHDOG, sub}; + + return ipc_dev_cmd(scu_ipc_dev, cmds, SCU_PARAM_LEN, in, + inlen, NULL, 0); } static int wdt_start(struct watchdog_device *wd) @@ -129,6 +135,10 @@ static int mid_wdt_probe(struct platform_device *pdev) if (!wdt_dev) return -ENOMEM; + scu_ipc_dev = devm_intel_ipc_dev_get(&pdev->dev, INTEL_SCU_IPC_DEV); + if (IS_ERR_OR_NULL(scu_ipc_dev)) + return PTR_ERR(scu_ipc_dev); + wdt_dev->info = &mid_wdt_info; wdt_dev->ops = &mid_wdt_ops; wdt_dev->min_timeout = MID_WDT_TIMEOUT_MIN; diff --git a/drivers/watchdog/intel_scu_watchdog.c b/drivers/watchdog/intel_scu_watchdog.c index 0caab62..55169cb 100644 --- a/drivers/watchdog/intel_scu_watchdog.c +++ b/drivers/watchdog/intel_scu_watchdog.c @@ -49,6 +49,7 @@ #include #include #include +#include #include "intel_scu_watchdog.h" @@ -94,6 +95,8 @@ MODULE_PARM_DESC(force_boot, static struct intel_scu_watchdog_dev watchdog_device; +static struct intel_ipc_dev *scu_ipc_dev; + /* Forces restart, if force_reboot is set */ static void watchdog_fire(void) { @@ -128,18 +131,14 @@ static int watchdog_set_ipc(int soft_threshold, int threshold) u32 *ipc_wbuf; u8 cbuf[16] = { '\0' }; int ipc_ret = 0; + u32 cmds[SCU_PARAM_LEN] = {IPC_SET_WATCHDOG_TIMER, 0}; ipc_wbuf = (u32 *)&cbuf; ipc_wbuf[0] = soft_threshold; ipc_wbuf[1] = threshold; - ipc_ret = intel_scu_ipc_command( - IPC_SET_WATCHDOG_TIMER, - 0, - ipc_wbuf, - 2, - NULL, - 0); + ipc_ret = ipc_dev_cmd(scu_ipc_dev, cmds, SCU_PARAM_LEN, ipc_wbuf, + 2, NULL, 0); if (ipc_ret != 0) pr_err("Error setting SCU watchdog timer: %x\n", ipc_ret); @@ -460,6 +459,10 @@ static int __init intel_scu_watchdog_init(void) if (check_timer_margin(timer_margin)) return -EINVAL; + scu_ipc_dev = intel_ipc_dev_get(INTEL_SCU_IPC_DEV); + if (IS_ERR_OR_NULL(scu_ipc_dev)) + return PTR_ERR(scu_ipc_dev); + watchdog_device.timer_tbl_ptr = sfi_get_mtmr(sfi_mtimer_num-1); if (watchdog_device.timer_tbl_ptr == NULL) { @@ -550,6 +553,7 @@ static void __exit intel_scu_watchdog_exit(void) { misc_deregister(&watchdog_device.miscdev); + intel_ipc_dev_put(scu_ipc_dev); unregister_reboot_notifier(&watchdog_device.intel_scu_notifier); /* disable the timer */ iowrite32(0x00000002, watchdog_device.timer_control_addr);