Remove dead code. If someone needs it the P-Unit semaphore is handled by
I2C DesignWare driver (drivers/i2c/busses/i2c-designware-baytrail.c).
Signed-off-by: Andy Shevchenko <andriy.shevche...@linux.intel.com>
---
.../atomisp/include/asm/intel_mid_pcihelpers.h | 2 -
.../platform/intel-mid/intel_mid_pcihelpers.c | 101 ---------------------
2 files changed, 103 deletions(-)
diff --git a/drivers/staging/media/atomisp/include/asm/intel_mid_pcihelpers.h
b/drivers/staging/media/atomisp/include/asm/intel_mid_pcihelpers.h
index c5e22bba455a..b7c079f3630a 100644
--- a/drivers/staging/media/atomisp/include/asm/intel_mid_pcihelpers.h
+++ b/drivers/staging/media/atomisp/include/asm/intel_mid_pcihelpers.h
@@ -33,5 +33,3 @@ void intel_mid_msgbus_write32(u8 port, u32 addr, u32 data);
u32 intel_mid_msgbus_read32_raw_ext(u32 cmd, u32 cmd_ext);
void intel_mid_msgbus_write32_raw_ext(u32 cmd, u32 cmd_ext, u32 data);
u32 intel_mid_soc_stepping(void);
-int intel_mid_dw_i2c_acquire_ownership(void);
-int intel_mid_dw_i2c_release_ownership(void);
diff --git
a/drivers/staging/media/atomisp/platform/intel-mid/intel_mid_pcihelpers.c
b/drivers/staging/media/atomisp/platform/intel-mid/intel_mid_pcihelpers.c
index cd452cc20fea..0d01a269989d 100644
--- a/drivers/staging/media/atomisp/platform/intel-mid/intel_mid_pcihelpers.c
+++ b/drivers/staging/media/atomisp/platform/intel-mid/intel_mid_pcihelpers.c
@@ -14,13 +14,6 @@
#define INTEL_ATOM_BYT 0x37
#define INTEL_ATOM_MOORFLD 0x5a
#define INTEL_ATOM_CHT 0x4c
-/* synchronization for sharing the I2C controller */
-#define PUNIT_PORT 0x04
-#define PUNIT_DOORBELL_OPCODE (0xE0)
-#define PUNIT_DOORBELL_REG (0x0)
-#ifndef CSTATE_EXIT_LATENCY
-#define CSTATE_EXIT_LATENCY_C1 1
-#endif
static inline int platform_is(u8 model)
{
return (boot_cpu_data.x86_model == model);
@@ -201,97 +194,3 @@ static void pci_d3_delay_fixup(struct pci_dev *dev)
}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_ANY_ID, pci_d3_delay_fixup);
-
-#define PUNIT_SEMAPHORE (platform_is(INTEL_ATOM_BYT) ? 0x7 : 0x10E)
-#define GET_SEM() (intel_mid_msgbus_read32(PUNIT_PORT, PUNIT_SEMAPHORE) & 0x1)
-
-static void reset_semaphore(void)
-{
- u32 data;
-
- data = intel_mid_msgbus_read32(PUNIT_PORT, PUNIT_SEMAPHORE);
- smp_mb();
- data = data & 0xfffffffc;
- intel_mid_msgbus_write32(PUNIT_PORT, PUNIT_SEMAPHORE, data);
- smp_mb();
-
-}
-
-int intel_mid_dw_i2c_acquire_ownership(void)
-{
- u32 ret = 0;
- u32 data = 0; /* data sent to PUNIT */
- u32 cmd;
- u32 cmdext;
- int timeout = 1000;
-
- if (DW_I2C_NEED_QOS)
- pm_qos_update_request(&pm_qos, CSTATE_EXIT_LATENCY_C1 - 1);
-
- /*
- * We need disable irq. Otherwise, the main thread
- * might be preempted and the other thread jumps to
- * disable irq for a long time. Another case is
- * some irq handlers might trigger power voltage change
- */
- BUG_ON(irqs_disabled());
- local_irq_disable();
-
- /* host driver writes 0x2 to side band register 0x7 */
- intel_mid_msgbus_write32(PUNIT_PORT, PUNIT_SEMAPHORE, 0x2);
- smp_mb();
-
- /* host driver sends 0xE0 opcode to PUNIT and writes 0 register */
- cmd = (PUNIT_DOORBELL_OPCODE << 24) | (PUNIT_PORT << 16) |
- ((PUNIT_DOORBELL_REG & 0xFF) << 8) | PCI_ROOT_MSGBUS_DWORD_ENABLE;
- cmdext = PUNIT_DOORBELL_REG & 0xffffff00;
-
- if (cmdext)
- intel_mid_msgbus_write32_raw_ext(cmd, cmdext, data);
- else
- intel_mid_msgbus_write32_raw(cmd, data);
-
- /* host driver waits for bit 0 to be set in side band 0x7 */
- while (GET_SEM() != 0x1) {
- udelay(100);
- timeout--;
- if (timeout <= 0) {
- pr_err("Timeout: semaphore timed out, reset sem\n");
- ret = -ETIMEDOUT;
- reset_semaphore();
- /*Delay 1ms in case race with punit*/
- udelay(1000);
- if (GET_SEM() != 0) {
- /*Reset again as kernel might race with punit*/
- reset_semaphore();
- }
- pr_err("PUNIT SEM: %d\n",
- intel_mid_msgbus_read32(PUNIT_PORT,
- PUNIT_SEMAPHORE));
- local_irq_enable();
-
- if (DW_I2C_NEED_QOS) {
- pm_qos_update_request(&pm_qos,
- PM_QOS_DEFAULT_VALUE);
- }
-
- return ret;
- }
- }
- smp_mb();
-
- return ret;
-}
-EXPORT_SYMBOL(intel_mid_dw_i2c_acquire_ownership);
-
-int intel_mid_dw_i2c_release_ownership(void)
-{
- reset_semaphore();
- local_irq_enable();
-
- if (DW_I2C_NEED_QOS)
- pm_qos_update_request(&pm_qos, PM_QOS_DEFAULT_VALUE);
-
- return 0;
-}
-EXPORT_SYMBOL(intel_mid_dw_i2c_release_ownership);
--
2.14.1
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