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baytrail: add lpss iosf functions and regs 

The low power subsystem devices have a lot of their
configuration done in the IOSF sideband message space.
Add support for these access methods.

BUG=chrome-os-partner:23790
BRANCH=None
TEST=Built and booted through depthcharge.

Change-Id: I0dd52b952a16ef1280c29301164db041ee87f636
Signed-off-by: Aaron Durbin <adurbin@chromum.org>
Reviewed-on: https://chromium-review.googlesource.com/175440
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Tested-by: Aaron Durbin <adurbin@chromium.org>
Commit-Queue: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/4921
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Tested-by: build bot (Jenkins)
This commit is contained in:
Aaron Durbin 2013-10-31 10:46:56 -05:00 committed by Aaron Durbin
parent 92fce495a7
commit bc69ae9823
2 changed files with 51 additions and 0 deletions
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29
src/soc/intel/baytrail/baytrail/iosf.h
View File

@ -68,6 +68,8 @@ uint32_t iosf_usbphy_read(int reg);
void iosf_usbphy_write(int reg, uint32_t val);
uint32_t iosf_ushphy_read(int reg);
void iosf_ushphy_write(int reg, uint32_t val);
uint32_t iosf_lpss_read(int reg);
void iosf_lpss_write(int reg, uint32_t val);
/* IOSF ports. */
#define IOSF_PORT_AUNIT 0x00 /* IO Arbiter unit */
@ -81,6 +83,7 @@ void iosf_ushphy_write(int reg, uint32_t val);
#define IOSF_PORT_SYSMEMIO 0x0c /* System Memory IO */
#define IOSF_PORT_USBPHY 0x43 /* USB PHY */
#define IOSF_PORT_USHPHY 0x61 /* USB XHCI PHY */
#define IOSF_PORT_LPSS 0xa0 /* LPSS - Low Power Subsystem */
#define IOSF_PORT_SATAPHY 0xa3 /* SATA PHY */
#define IOSF_PORT_PCIEPHY 0xa3 /* PCIE PHY */
@ -103,6 +106,8 @@ void iosf_ushphy_write(int reg, uint32_t val);
#define IOSF_OP_WRITE_USBPHY (IOSF_OP_READ_USBPHY | 1)
#define IOSF_OP_READ_USHPHY 0x06
#define IOSF_OP_WRITE_USHPHY (IOSF_OP_READ_USHPHY | 1)
#define IOSF_OP_READ_LPSS 0x06
#define IOSF_OP_WRITE_LPSS (IOSF_OP_READ_LPSS | 1)
#define IOSF_OP_READ_SATAPHY 0x00
#define IOSF_OP_WRITE_SATAPHY (IOSF_OP_READ_SATAPHY | 1)
#define IOSF_OP_READ_PCIEPHY 0x00
@ -167,4 +172,28 @@ void iosf_ushphy_write(int reg, uint32_t val);
#define PUNIT_PWRGT_STATUS 0x61
#define PUNIT_GPU_EC_VIRUS 0xd2
/*
* LPSS Registers
*/
#define LPSS_SIO_DMA1_CTL 0x280
#define LPSS_I2C1_CTL 0x288
#define LPSS_I2C2_CTL 0x290
#define LPSS_I2C3_CTL 0x298
#define LPSS_I2C4_CTL 0x2a0
#define LPSS_I2C5_CTL 0x2a8
#define LPSS_I2C6_CTL 0x2b0
#define LPSS_I2C7_CTL 0x2b8
#define LPSS_SIO_DMA2_CTL 0x240
#define LPSS_PWM1_CTL 0x248
#define LPSS_PWM2_CTL 0x250
#define LPSS_HSUART1_CTL 0x258
#define LPSS_HSUART2_CTL 0x260
#define LPSS_SPI_CTL 0x268
# define LPSS_CTL_ACPI_INT_EN (1 << 21)
# define LPSS_CTL_PCI_CFG_DIS (1 << 20)
# define LPSS_CTL_SNOOP (1 << 18)
# define LPSS_CTL_NOSNOOP (1 << 19)
# define LPSS_CTL_PM_CAP_PRSNT (1 << 1)
#endif /* _BAYTRAIL_IOSF_H_ */

22
src/soc/intel/baytrail/iosf.c
View File

@ -165,3 +165,25 @@ void iosf_ushphy_write(int reg, uint32_t val)
write_iosf_reg(MCRX_REG, IOSF_REG_UPPER(reg));
write_iosf_reg(MCR_REG, cr);
}
uint32_t iosf_lpss_read(int reg)
{
uint32_t cr = IOSF_OPCODE(IOSF_OP_READ_LPSS) |
IOSF_PORT(IOSF_PORT_LPSS) | IOSF_REG(reg) |
IOSF_BYTE_EN;
write_iosf_reg(MCRX_REG, IOSF_REG_UPPER(reg));
write_iosf_reg(MCR_REG, cr);
return read_iosf_reg(MDR_REG);
}
void iosf_lpss_write(int reg, uint32_t val)
{
uint32_t cr = IOSF_OPCODE(IOSF_OP_WRITE_LPSS) |
IOSF_PORT(IOSF_PORT_LPSS) | IOSF_REG(reg) |
IOSF_BYTE_EN;
write_iosf_reg(MDR_REG, val);
write_iosf_reg(MCRX_REG, IOSF_REG_UPPER(reg));
write_iosf_reg(MCR_REG, cr);
}