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Diffstat (limited to 'drivers/platform/x86/intel_scu_ipc.c')
-rw-r--r--drivers/platform/x86/intel_scu_ipc.c337
1 files changed, 132 insertions, 205 deletions
diff --git a/drivers/platform/x86/intel_scu_ipc.c b/drivers/platform/x86/intel_scu_ipc.c
index a91d510a798..76ca094ed01 100644
--- a/drivers/platform/x86/intel_scu_ipc.c
+++ b/drivers/platform/x86/intel_scu_ipc.c
@@ -9,7 +9,7 @@
* as published by the Free Software Foundation; version 2
* of the License.
*
- * SCU runing in ARC processor communicates with other entity running in IA
+ * SCU running in ARC processor communicates with other entity running in IA
* core through IPC mechanism which in turn messaging between IA core ad SCU.
* SCU has two IPC mechanism IPC-1 and IPC-2. IPC-1 is used between IA32 and
* SCU where IPC-2 is used between P-Unit and SCU. This driver delas with
@@ -19,12 +19,13 @@
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/init.h>
-#include <linux/sysdev.h>
+#include <linux/device.h>
#include <linux/pm.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/sfi.h>
-#include <asm/mrst.h>
+#include <linux/module.h>
+#include <asm/intel-mid.h>
#include <asm/intel_scu_ipc.h>
/* IPC defines the following message types */
@@ -57,12 +58,48 @@
* message handler is called within firmware.
*/
-#define IPC_BASE_ADDR 0xFF11C000 /* IPC1 base register address */
-#define IPC_MAX_ADDR 0x100 /* Maximum IPC regisers */
#define IPC_WWBUF_SIZE 20 /* IPC Write buffer Size */
#define IPC_RWBUF_SIZE 20 /* IPC Read buffer Size */
-#define IPC_I2C_BASE 0xFF12B000 /* I2C control register base address */
-#define IPC_I2C_MAX_ADDR 0x10 /* Maximum I2C regisers */
+#define IPC_IOC 0x100 /* IPC command register IOC bit */
+
+#define PCI_DEVICE_ID_LINCROFT 0x082a
+#define PCI_DEVICE_ID_PENWELL 0x080e
+#define PCI_DEVICE_ID_CLOVERVIEW 0x08ea
+#define PCI_DEVICE_ID_TANGIER 0x11a0
+
+/* intel scu ipc driver data*/
+struct intel_scu_ipc_pdata_t {
+ u32 ipc_base;
+ u32 i2c_base;
+ u32 ipc_len;
+ u32 i2c_len;
+ u8 irq_mode;
+};
+
+static struct intel_scu_ipc_pdata_t intel_scu_ipc_lincroft_pdata = {
+ .ipc_base = 0xff11c000,
+ .i2c_base = 0xff12b000,
+ .ipc_len = 0x100,
+ .i2c_len = 0x10,
+ .irq_mode = 0,
+};
+
+/* Penwell and Cloverview */
+static struct intel_scu_ipc_pdata_t intel_scu_ipc_penwell_pdata = {
+ .ipc_base = 0xff11c000,
+ .i2c_base = 0xff12b000,
+ .ipc_len = 0x100,
+ .i2c_len = 0x10,
+ .irq_mode = 1,
+};
+
+static struct intel_scu_ipc_pdata_t intel_scu_ipc_tangier_pdata = {
+ .ipc_base = 0xff009000,
+ .i2c_base = 0xff00d000,
+ .ipc_len = 0x100,
+ .i2c_len = 0x10,
+ .irq_mode = 0,
+};
static int ipc_probe(struct pci_dev *dev, const struct pci_device_id *id);
static void ipc_remove(struct pci_dev *pdev);
@@ -71,6 +108,8 @@ struct intel_scu_ipc_dev {
struct pci_dev *pdev;
void __iomem *ipc_base;
void __iomem *i2c_base;
+ struct completion cmd_complete;
+ u8 irq_mode;
};
static struct intel_scu_ipc_dev ipcdev; /* Only one for now */
@@ -97,6 +136,10 @@ static DEFINE_MUTEX(ipclock); /* lock used to prevent multiple call to SCU */
*/
static inline void ipc_command(u32 cmd) /* Send ipc command */
{
+ if (ipcdev.irq_mode) {
+ reinit_completion(&ipcdev.cmd_complete);
+ writel(cmd | IPC_IOC, ipcdev.ipc_base);
+ }
writel(cmd, ipcdev.ipc_base);
}
@@ -155,10 +198,34 @@ static inline int busy_loop(void) /* Wait till scu status is busy */
return 0;
}
+/* Wait till ipc ioc interrupt is received or timeout in 3 HZ */
+static inline int ipc_wait_for_interrupt(void)
+{
+ int status;
+
+ if (!wait_for_completion_timeout(&ipcdev.cmd_complete, 3 * HZ)) {
+ struct device *dev = &ipcdev.pdev->dev;
+ dev_err(dev, "IPC timed out\n");
+ return -ETIMEDOUT;
+ }
+
+ status = ipc_read_status();
+
+ if ((status >> 1) & 1)
+ return -EIO;
+
+ return 0;
+}
+
+int intel_scu_ipc_check_status(void)
+{
+ return ipcdev.irq_mode ? ipc_wait_for_interrupt() : busy_loop();
+}
+
/* 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)
{
- int i, nc, bytes, d;
+ int nc;
u32 offset = 0;
int err;
u8 cbuf[IPC_WWBUF_SIZE] = { };
@@ -173,55 +240,34 @@ static int pwr_reg_rdwr(u16 *addr, u8 *data, u32 count, u32 op, u32 id)
return -ENODEV;
}
- if (platform != MRST_CPU_CHIP_PENWELL) {
- bytes = 0;
- d = 0;
- for (i = 0; i < count; i++) {
- cbuf[bytes++] = addr[i];
- cbuf[bytes++] = addr[i] >> 8;
- if (id != IPC_CMD_PCNTRL_R)
- cbuf[bytes++] = data[d++];
- if (id == IPC_CMD_PCNTRL_M)
- cbuf[bytes++] = data[d++];
- }
- for (i = 0; i < bytes; i += 4)
- ipc_data_writel(wbuf[i/4], i);
- ipc_command(bytes << 16 | id << 12 | 0 << 8 | op);
- } else {
- for (nc = 0; nc < count; nc++, offset += 2) {
- cbuf[offset] = addr[nc];
- cbuf[offset + 1] = addr[nc] >> 8;
- }
+ for (nc = 0; nc < count; nc++, offset += 2) {
+ cbuf[offset] = addr[nc];
+ cbuf[offset + 1] = addr[nc] >> 8;
+ }
- if (id == IPC_CMD_PCNTRL_R) {
- for (nc = 0, offset = 0; nc < count; nc++, offset += 4)
- ipc_data_writel(wbuf[nc], offset);
- ipc_command((count*2) << 16 | id << 12 | 0 << 8 | op);
- } 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(wbuf[nc], offset);
- ipc_command((count*3) << 16 | id << 12 | 0 << 8 | op);
- } else if (id == IPC_CMD_PCNTRL_M) {
- cbuf[offset] = data[0];
- cbuf[offset + 1] = data[1];
- ipc_data_writel(wbuf[0], 0); /* Write wbuff */
- ipc_command(4 << 16 | id << 12 | 0 << 8 | op);
- }
+ if (id == IPC_CMD_PCNTRL_R) {
+ for (nc = 0, offset = 0; nc < count; nc++, offset += 4)
+ ipc_data_writel(wbuf[nc], offset);
+ ipc_command((count*2) << 16 | id << 12 | 0 << 8 | op);
+ } 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(wbuf[nc], offset);
+ ipc_command((count*3) << 16 | id << 12 | 0 << 8 | op);
+ } else if (id == IPC_CMD_PCNTRL_M) {
+ cbuf[offset] = data[0];
+ cbuf[offset + 1] = data[1];
+ ipc_data_writel(wbuf[0], 0); /* Write wbuff */
+ ipc_command(4 << 16 | id << 12 | 0 << 8 | op);
}
- err = busy_loop();
- if (id == IPC_CMD_PCNTRL_R) { /* Read rbuf */
+ err = intel_scu_ipc_check_status();
+ if (!err && id == IPC_CMD_PCNTRL_R) { /* Read rbuf */
/* Workaround: values are read as 0 without memcpy_fromio */
memcpy_fromio(cbuf, ipcdev.ipc_base + 0x90, 16);
- if (platform != MRST_CPU_CHIP_PENWELL) {
- for (nc = 0, offset = 2; nc < count; nc++, offset += 3)
- data[nc] = ipc_data_readb(offset);
- } else {
- for (nc = 0; nc < count; nc++)
- data[nc] = ipc_data_readb(nc);
- }
+ for (nc = 0; nc < count; nc++)
+ data[nc] = ipc_data_readb(nc);
}
mutex_unlock(&ipclock);
return err;
@@ -411,7 +457,7 @@ int intel_scu_ipc_simple_command(int cmd, int sub)
return -ENODEV;
}
ipc_command(sub << 12 | cmd);
- err = busy_loop();
+ err = intel_scu_ipc_check_status();
mutex_unlock(&ipclock);
return err;
}
@@ -445,10 +491,12 @@ int intel_scu_ipc_command(int cmd, int sub, u32 *in, int inlen,
ipc_data_writel(*in++, 4 * i);
ipc_command((inlen << 16) | (sub << 12) | cmd);
- err = busy_loop();
+ err = intel_scu_ipc_check_status();
- for (i = 0; i < outlen; i++)
- *out++ = ipc_data_readl(4 * i);
+ if (!err) {
+ for (i = 0; i < outlen; i++)
+ *out++ = ipc_data_readl(4 * i);
+ }
mutex_unlock(&ipclock);
return err;
@@ -502,148 +550,6 @@ int intel_scu_ipc_i2c_cntrl(u32 addr, u32 *data)
}
EXPORT_SYMBOL(intel_scu_ipc_i2c_cntrl);
-#define IPC_FW_LOAD_ADDR 0xFFFC0000 /* Storage location for FW image */
-#define IPC_FW_UPDATE_MBOX_ADDR 0xFFFFDFF4 /* Mailbox between ipc and scu */
-#define IPC_MAX_FW_SIZE 262144 /* 256K storage size for loading the FW image */
-#define IPC_FW_MIP_HEADER_SIZE 2048 /* Firmware MIP header size */
-/* IPC inform SCU to get ready for update process */
-#define IPC_CMD_FW_UPDATE_READY 0x10FE
-/* IPC inform SCU to go for update process */
-#define IPC_CMD_FW_UPDATE_GO 0x20FE
-/* Status code for fw update */
-#define IPC_FW_UPDATE_SUCCESS 0x444f4e45 /* Status code 'DONE' */
-#define IPC_FW_UPDATE_BADN 0x4241444E /* Status code 'BADN' */
-#define IPC_FW_TXHIGH 0x54784849 /* Status code 'IPC_FW_TXHIGH' */
-#define IPC_FW_TXLOW 0x54784c4f /* Status code 'IPC_FW_TXLOW' */
-
-struct fw_update_mailbox {
- u32 status;
- u32 scu_flag;
- u32 driver_flag;
-};
-
-
-/**
- * intel_scu_ipc_fw_update - Firmware update utility
- * @buffer: firmware buffer
- * @length: size of firmware buffer
- *
- * This function provides an interface to load the firmware into
- * the SCU. Returns 0 on success or -1 on failure
- */
-int intel_scu_ipc_fw_update(u8 *buffer, u32 length)
-{
- void __iomem *fw_update_base;
- struct fw_update_mailbox __iomem *mailbox = NULL;
- int retry_cnt = 0;
- u32 status;
-
- mutex_lock(&ipclock);
- fw_update_base = ioremap_nocache(IPC_FW_LOAD_ADDR, (128*1024));
- if (fw_update_base == NULL) {
- mutex_unlock(&ipclock);
- return -ENOMEM;
- }
- mailbox = ioremap_nocache(IPC_FW_UPDATE_MBOX_ADDR,
- sizeof(struct fw_update_mailbox));
- if (mailbox == NULL) {
- iounmap(fw_update_base);
- mutex_unlock(&ipclock);
- return -ENOMEM;
- }
-
- ipc_command(IPC_CMD_FW_UPDATE_READY);
-
- /* Intitialize mailbox */
- writel(0, &mailbox->status);
- writel(0, &mailbox->scu_flag);
- writel(0, &mailbox->driver_flag);
-
- /* Driver copies the 2KB MIP header to SRAM at 0xFFFC0000*/
- memcpy_toio(fw_update_base, buffer, 0x800);
-
- /* Driver sends "FW Update" IPC command (CMD_ID 0xFE; MSG_ID 0x02).
- * Upon receiving this command, SCU will write the 2K MIP header
- * from 0xFFFC0000 into NAND.
- * SCU will write a status code into the Mailbox, and then set scu_flag.
- */
-
- ipc_command(IPC_CMD_FW_UPDATE_GO);
-
- /*Driver stalls until scu_flag is set */
- while (readl(&mailbox->scu_flag) != 1) {
- rmb();
- mdelay(1);
- }
-
- /* Driver checks Mailbox status.
- * If the status is 'BADN', then abort (bad NAND).
- * If the status is 'IPC_FW_TXLOW', then continue.
- */
- while (readl(&mailbox->status) != IPC_FW_TXLOW) {
- rmb();
- mdelay(10);
- }
- mdelay(10);
-
-update_retry:
- if (retry_cnt > 5)
- goto update_end;
-
- if (readl(&mailbox->status) != IPC_FW_TXLOW)
- goto update_end;
- buffer = buffer + 0x800;
- memcpy_toio(fw_update_base, buffer, 0x20000);
- writel(1, &mailbox->driver_flag);
- while (readl(&mailbox->scu_flag) == 1) {
- rmb();
- mdelay(1);
- }
-
- /* check for 'BADN' */
- if (readl(&mailbox->status) == IPC_FW_UPDATE_BADN)
- goto update_end;
-
- while (readl(&mailbox->status) != IPC_FW_TXHIGH) {
- rmb();
- mdelay(10);
- }
- mdelay(10);
-
- if (readl(&mailbox->status) != IPC_FW_TXHIGH)
- goto update_end;
-
- buffer = buffer + 0x20000;
- memcpy_toio(fw_update_base, buffer, 0x20000);
- writel(0, &mailbox->driver_flag);
-
- while (mailbox->scu_flag == 0) {
- rmb();
- mdelay(1);
- }
-
- /* check for 'BADN' */
- if (readl(&mailbox->status) == IPC_FW_UPDATE_BADN)
- goto update_end;
-
- if (readl(&mailbox->status) == IPC_FW_TXLOW) {
- ++retry_cnt;
- goto update_retry;
- }
-
-update_end:
- status = readl(&mailbox->status);
-
- iounmap(fw_update_base);
- iounmap(mailbox);
- mutex_unlock(&ipclock);
-
- if (status == IPC_FW_UPDATE_SUCCESS)
- return 0;
- return -EIO;
-}
-EXPORT_SYMBOL(intel_scu_ipc_fw_update);
-
/*
* 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
@@ -653,6 +559,9 @@ EXPORT_SYMBOL(intel_scu_ipc_fw_update);
*/
static irqreturn_t ioc(int irq, void *dev_id)
{
+ if (ipcdev.irq_mode)
+ complete(&ipcdev.cmd_complete);
+
return IRQ_HANDLED;
}
@@ -667,12 +576,16 @@ static irqreturn_t ioc(int irq, void *dev_id)
static int ipc_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
int err;
+ struct intel_scu_ipc_pdata_t *pdata;
resource_size_t pci_resource;
if (ipcdev.pdev) /* We support only one SCU */
return -EBUSY;
+ pdata = (struct intel_scu_ipc_pdata_t *)id->driver_data;
+
ipcdev.pdev = pci_dev_get(dev);
+ ipcdev.irq_mode = pdata->irq_mode;
err = pci_enable_device(dev);
if (err)
@@ -686,14 +599,16 @@ static int ipc_probe(struct pci_dev *dev, const struct pci_device_id *id)
if (!pci_resource)
return -ENOMEM;
+ init_completion(&ipcdev.cmd_complete);
+
if (request_irq(dev->irq, ioc, 0, "intel_scu_ipc", &ipcdev))
return -EBUSY;
- ipcdev.ipc_base = ioremap_nocache(IPC_BASE_ADDR, IPC_MAX_ADDR);
+ ipcdev.ipc_base = ioremap_nocache(pdata->ipc_base, pdata->ipc_len);
if (!ipcdev.ipc_base)
return -ENOMEM;
- ipcdev.i2c_base = ioremap_nocache(IPC_I2C_BASE, IPC_I2C_MAX_ADDR);
+ ipcdev.i2c_base = ioremap_nocache(pdata->i2c_base, pdata->i2c_len);
if (!ipcdev.i2c_base) {
iounmap(ipcdev.ipc_base);
return -ENOMEM;
@@ -725,10 +640,22 @@ static void ipc_remove(struct pci_dev *pdev)
intel_scu_devices_destroy();
}
-static const struct pci_device_id pci_ids[] = {
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x080e)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x082a)},
- { 0,}
+static DEFINE_PCI_DEVICE_TABLE(pci_ids) = {
+ {
+ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_LINCROFT),
+ (kernel_ulong_t)&intel_scu_ipc_lincroft_pdata,
+ }, {
+ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_PENWELL),
+ (kernel_ulong_t)&intel_scu_ipc_penwell_pdata,
+ }, {
+ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_CLOVERVIEW),
+ (kernel_ulong_t)&intel_scu_ipc_penwell_pdata,
+ }, {
+ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_TANGIER),
+ (kernel_ulong_t)&intel_scu_ipc_tangier_pdata,
+ }, {
+ 0,
+ }
};
MODULE_DEVICE_TABLE(pci, pci_ids);
@@ -742,7 +669,7 @@ static struct pci_driver ipc_driver = {
static int __init intel_scu_ipc_init(void)
{
- platform = mrst_identify_cpu();
+ platform = intel_mid_identify_cpu();
if (platform == 0)
return -ENODEV;
return pci_register_driver(&ipc_driver);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 16:29:49 +0000