diff options
Diffstat (limited to 'drivers/platform/x86/intel_scu_ipc.c')
| -rw-r--r-- | drivers/platform/x86/intel_scu_ipc.c | 117 |
1 files changed, 103 insertions, 14 deletions
diff --git a/drivers/platform/x86/intel_scu_ipc.c b/drivers/platform/x86/intel_scu_ipc.c index d654f831410d..60ea476a9130 100644 --- a/drivers/platform/x86/intel_scu_ipc.c +++ b/drivers/platform/x86/intel_scu_ipc.c @@ -58,12 +58,56 @@ * 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 */ + +enum { + SCU_IPC_LINCROFT, + SCU_IPC_PENWELL, + SCU_IPC_CLOVERVIEW, + SCU_IPC_TANGIER, +}; + +/* 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_pdata[] = { + [SCU_IPC_LINCROFT] = { + .ipc_base = 0xff11c000, + .i2c_base = 0xff12b000, + .ipc_len = 0x100, + .i2c_len = 0x10, + .irq_mode = 0, + }, + [SCU_IPC_PENWELL] = { + .ipc_base = 0xff11c000, + .i2c_base = 0xff12b000, + .ipc_len = 0x100, + .i2c_len = 0x10, + .irq_mode = 1, + }, + [SCU_IPC_CLOVERVIEW] = { + .ipc_base = 0xff11c000, + .i2c_base = 0xff12b000, + .ipc_len = 0x100, + .i2c_len = 0x10, + .irq_mode = 1, + }, + [SCU_IPC_TANGIER] = { + .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); @@ -72,6 +116,8 @@ 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 */ @@ -98,6 +144,10 @@ 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); } @@ -156,6 +206,30 @@ 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) { @@ -196,8 +270,8 @@ static int pwr_reg_rdwr(u16 *addr, u8 *data, u32 count, u32 op, u32 id) 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); for (nc = 0; nc < count; nc++) @@ -391,7 +465,7 @@ 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; } @@ -425,10 +499,12 @@ 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; @@ -491,6 +567,9 @@ EXPORT_SYMBOL(intel_scu_ipc_i2c_cntrl); */ static irqreturn_t ioc(int irq, void *dev_id) { + if (ipcdev.irq_mode) + complete(&ipcdev.cmd_complete); + return IRQ_HANDLED; } @@ -504,13 +583,18 @@ 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; + int err, pid; + struct intel_scu_ipc_pdata_t *pdata; resource_size_t pci_resource; if (ipcdev.pdev) /* We support only one SCU */ return -EBUSY; + pid = id->driver_data; + pdata = &intel_scu_ipc_pdata[pid]; + ipcdev.pdev = pci_dev_get(dev); + ipcdev.irq_mode = pdata->irq_mode; err = pci_enable_device(dev); if (err) @@ -524,14 +608,16 @@ 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; @@ -564,7 +650,10 @@ static void ipc_remove(struct pci_dev *pdev) } static DEFINE_PCI_DEVICE_TABLE(pci_ids) = { - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x082a)}, + {PCI_VDEVICE(INTEL, 0x082a), SCU_IPC_LINCROFT}, + {PCI_VDEVICE(INTEL, 0x080e), SCU_IPC_PENWELL}, + {PCI_VDEVICE(INTEL, 0x08ea), SCU_IPC_CLOVERVIEW}, + {PCI_VDEVICE(INTEL, 0x11a0), SCU_IPC_TANGIER}, { 0,} }; MODULE_DEVICE_TABLE(pci, pci_ids); |