diff options
Diffstat (limited to 'ichspi.c')
| -rw-r--r-- | ichspi.c | 55 |
1 files changed, 30 insertions, 25 deletions
@@ -43,17 +43,18 @@ #include "spi.h" /* ICH9 controller register definition */ -#define ICH9_REG_FADDR 0x08 /* 32 Bits */ -#define ICH9_REG_FDATA0 0x10 /* 64 Bytes */ +#define ICH9_REG_FADDR 0x08 /* 32 Bits */ +#define ICH9_REG_FDATA0 0x10 /* 64 Bytes */ -#define ICH9_REG_SSFS 0x90 /* 08 Bits */ +#define ICH9_REG_SSFS 0x90 /* 08 Bits */ #define SSFS_SCIP 0x00000001 #define SSFS_CDS 0x00000004 #define SSFS_FCERR 0x00000008 #define SSFS_AEL 0x00000010 +/* The following bits are reserved in SSFS: 1,5-7. */ #define SSFS_RESERVED_MASK 0x000000e2 -#define ICH9_REG_SSFC 0x91 /* 24 Bits */ +#define ICH9_REG_SSFC 0x91 /* 24 Bits */ #define SSFC_SCGO 0x00000200 #define SSFC_ACS 0x00000400 #define SSFC_SPOP 0x00000800 @@ -64,20 +65,23 @@ #define SSFC_SCF 0x01000000 #define SSFC_SCF_20MHZ 0x00000000 #define SSFC_SCF_33MHZ 0x01000000 +/* We combine SSFS and SSFC to one 32-bit word, + * therefore SSFC bits are off by 8. + * The following bits are reserved in SSFC: 23-19,7,0. */ #define SSFC_RESERVED_MASK 0xf8008100 -#define ICH9_REG_PREOP 0x94 /* 16 Bits */ -#define ICH9_REG_OPTYPE 0x96 /* 16 Bits */ -#define ICH9_REG_OPMENU 0x98 /* 64 Bits */ +#define ICH9_REG_PREOP 0x94 /* 16 Bits */ +#define ICH9_REG_OPTYPE 0x96 /* 16 Bits */ +#define ICH9_REG_OPMENU 0x98 /* 64 Bits */ // ICH9R SPI commands -#define SPI_OPCODE_TYPE_READ_NO_ADDRESS 0 -#define SPI_OPCODE_TYPE_WRITE_NO_ADDRESS 1 -#define SPI_OPCODE_TYPE_READ_WITH_ADDRESS 2 -#define SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS 3 +#define SPI_OPCODE_TYPE_READ_NO_ADDRESS 0 +#define SPI_OPCODE_TYPE_WRITE_NO_ADDRESS 1 +#define SPI_OPCODE_TYPE_READ_WITH_ADDRESS 2 +#define SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS 3 // ICH7 registers -#define ICH7_REG_SPIS 0x00 /* 16 Bits */ +#define ICH7_REG_SPIS 0x00 /* 16 Bits */ #define SPIS_SCIP 0x0001 #define SPIS_GRANT 0x0002 #define SPIS_CDS 0x0004 @@ -94,17 +98,17 @@ bit 7 is used with fast read and one shot controls CS de-assert? */ -#define ICH7_REG_SPIC 0x02 /* 16 Bits */ -#define SPIC_SCGO 0x0002 -#define SPIC_ACS 0x0004 -#define SPIC_SPOP 0x0008 -#define SPIC_DS 0x4000 +#define ICH7_REG_SPIC 0x02 /* 16 Bits */ +#define SPIC_SCGO 0x0002 +#define SPIC_ACS 0x0004 +#define SPIC_SPOP 0x0008 +#define SPIC_DS 0x4000 -#define ICH7_REG_SPIA 0x04 /* 32 Bits */ -#define ICH7_REG_SPID0 0x08 /* 64 Bytes */ -#define ICH7_REG_PREOP 0x54 /* 16 Bits */ -#define ICH7_REG_OPTYPE 0x56 /* 16 Bits */ -#define ICH7_REG_OPMENU 0x58 /* 64 Bits */ +#define ICH7_REG_SPIA 0x04 /* 32 Bits */ +#define ICH7_REG_SPID0 0x08 /* 64 Bytes */ +#define ICH7_REG_PREOP 0x54 /* 16 Bits */ +#define ICH7_REG_OPTYPE 0x56 /* 16 Bits */ +#define ICH7_REG_OPMENU 0x58 /* 64 Bits */ /* ICH SPI configuration lock-down. May be set during chipset enabling. */ static int ichspi_lock = 0; @@ -597,7 +601,7 @@ static int ich7_run_opcode(OPCODE op, uint32_t offset, - waiting for the busy bit (WIP) to be cleared This means the timeout must be sufficient for chip erase of slow high-capacity chips. - */ + */ switch (op.atomic) { case 2: /* Select second preop. */ @@ -703,7 +707,7 @@ static int ich9_run_opcode(OPCODE op, uint32_t offset, /* Assemble SSFS + SSFC */ temp32 = REGREAD32(ICH9_REG_SSFS); - /* keep reserved bits */ + /* Keep reserved bits only */ temp32 &= SSFS_RESERVED_MASK | SSFC_RESERVED_MASK; /* clear error status registers */ temp32 |= (SSFS_CDS + SSFS_FCERR); @@ -712,6 +716,7 @@ static int ich9_run_opcode(OPCODE op, uint32_t offset, /* Use 20 MHz */ temp32 |= SSFC_SCF_20MHZ; + /* Set data byte count (DBC) and data cycle bit (DS) */ if (datalength != 0) { uint32_t datatemp; temp32 |= SSFC_DS; @@ -742,7 +747,7 @@ static int ich9_run_opcode(OPCODE op, uint32_t offset, - waiting for the busy bit (WIP) to be cleared This means the timeout must be sufficient for chip erase of slow high-capacity chips. - */ + */ switch (op.atomic) { case 2: /* Select second preop. */ |