diff options
Diffstat (limited to 'include/linux/eeprom.h')
| -rw-r--r-- | include/linux/eeprom.h | 136 |
1 files changed, 0 insertions, 136 deletions
diff --git a/include/linux/eeprom.h b/include/linux/eeprom.h deleted file mode 100644 index 38afd9da1dfe..000000000000 --- a/include/linux/eeprom.h +++ /dev/null | |||
| @@ -1,136 +0,0 @@ | |||
| 1 | /* credit winbond-840.c | ||
| 2 | */ | ||
| 3 | #include <asm/io.h> | ||
| 4 | struct eeprom_ops { | ||
| 5 | void (*set_cs)(void *ee); | ||
| 6 | void (*clear_cs)(void *ee); | ||
| 7 | }; | ||
| 8 | |||
| 9 | #define EEPOL_EEDI 0x01 | ||
| 10 | #define EEPOL_EEDO 0x02 | ||
| 11 | #define EEPOL_EECLK 0x04 | ||
| 12 | #define EEPOL_EESEL 0x08 | ||
| 13 | |||
| 14 | struct eeprom { | ||
| 15 | void *dev; | ||
| 16 | struct eeprom_ops *ops; | ||
| 17 | |||
| 18 | void __iomem * addr; | ||
| 19 | |||
| 20 | unsigned ee_addr_bits; | ||
| 21 | |||
| 22 | unsigned eesel; | ||
| 23 | unsigned eeclk; | ||
| 24 | unsigned eedo; | ||
| 25 | unsigned eedi; | ||
| 26 | unsigned polarity; | ||
| 27 | unsigned ee_state; | ||
| 28 | |||
| 29 | spinlock_t *lock; | ||
| 30 | u32 *cache; | ||
| 31 | }; | ||
| 32 | |||
| 33 | |||
| 34 | u8 eeprom_readb(struct eeprom *ee, unsigned address); | ||
| 35 | void eeprom_read(struct eeprom *ee, unsigned address, u8 *bytes, | ||
| 36 | unsigned count); | ||
| 37 | void eeprom_writeb(struct eeprom *ee, unsigned address, u8 data); | ||
| 38 | void eeprom_write(struct eeprom *ee, unsigned address, u8 *bytes, | ||
| 39 | unsigned count); | ||
| 40 | |||
| 41 | /* The EEPROM commands include the alway-set leading bit. */ | ||
| 42 | enum EEPROM_Cmds { | ||
| 43 | EE_WriteCmd=(5 << 6), EE_ReadCmd=(6 << 6), EE_EraseCmd=(7 << 6), | ||
| 44 | }; | ||
| 45 | |||
| 46 | void setup_ee_mem_bitbanger(struct eeprom *ee, void __iomem *memaddr, int eesel_bit, int eeclk_bit, int eedo_bit, int eedi_bit, unsigned polarity) | ||
| 47 | { | ||
| 48 | ee->addr = memaddr; | ||
| 49 | ee->eesel = 1 << eesel_bit; | ||
| 50 | ee->eeclk = 1 << eeclk_bit; | ||
| 51 | ee->eedo = 1 << eedo_bit; | ||
| 52 | ee->eedi = 1 << eedi_bit; | ||
| 53 | |||
| 54 | ee->polarity = polarity; | ||
| 55 | |||
| 56 | *ee->cache = readl(ee->addr); | ||
| 57 | } | ||
| 58 | |||
| 59 | /* foo. put this in a .c file */ | ||
| 60 | static inline void eeprom_update(struct eeprom *ee, u32 mask, int pol) | ||
| 61 | { | ||
| 62 | unsigned long flags; | ||
| 63 | u32 data; | ||
| 64 | |||
| 65 | spin_lock_irqsave(ee->lock, flags); | ||
| 66 | data = *ee->cache; | ||
| 67 | |||
| 68 | data &= ~mask; | ||
| 69 | if (pol) | ||
| 70 | data |= mask; | ||
| 71 | |||
| 72 | *ee->cache = data; | ||
| 73 | //printk("update: %08x\n", data); | ||
| 74 | writel(data, ee->addr); | ||
| 75 | spin_unlock_irqrestore(ee->lock, flags); | ||
| 76 | } | ||
| 77 | |||
| 78 | void eeprom_clk_lo(struct eeprom *ee) | ||
| 79 | { | ||
| 80 | int pol = !!(ee->polarity & EEPOL_EECLK); | ||
| 81 | |||
| 82 | eeprom_update(ee, ee->eeclk, pol); | ||
| 83 | udelay(2); | ||
| 84 | } | ||
| 85 | |||
| 86 | void eeprom_clk_hi(struct eeprom *ee) | ||
| 87 | { | ||
| 88 | int pol = !!(ee->polarity & EEPOL_EECLK); | ||
| 89 | |||
| 90 | eeprom_update(ee, ee->eeclk, !pol); | ||
| 91 | udelay(2); | ||
| 92 | } | ||
| 93 | |||
| 94 | void eeprom_send_addr(struct eeprom *ee, unsigned address) | ||
| 95 | { | ||
| 96 | int pol = !!(ee->polarity & EEPOL_EEDI); | ||
| 97 | unsigned i; | ||
| 98 | address |= 6 << 6; | ||
| 99 | |||
| 100 | /* Shift the read command bits out. */ | ||
| 101 | for (i=0; i<11; i++) { | ||
| 102 | eeprom_update(ee, ee->eedi, ((address >> 10) & 1) ^ pol); | ||
| 103 | address <<= 1; | ||
| 104 | eeprom_clk_hi(ee); | ||
| 105 | eeprom_clk_lo(ee); | ||
| 106 | } | ||
| 107 | eeprom_update(ee, ee->eedi, pol); | ||
| 108 | } | ||
| 109 | |||
| 110 | u16 eeprom_readw(struct eeprom *ee, unsigned address) | ||
| 111 | { | ||
| 112 | unsigned i; | ||
| 113 | u16 res = 0; | ||
| 114 | |||
| 115 | eeprom_clk_lo(ee); | ||
| 116 | eeprom_update(ee, ee->eesel, 1 ^ !!(ee->polarity & EEPOL_EESEL)); | ||
| 117 | eeprom_send_addr(ee, address); | ||
| 118 | |||
| 119 | for (i=0; i<16; i++) { | ||
| 120 | u32 data; | ||
| 121 | eeprom_clk_hi(ee); | ||
| 122 | res <<= 1; | ||
| 123 | data = readl(ee->addr); | ||
| 124 | //printk("eeprom_readw: %08x\n", data); | ||
| 125 | res |= !!(data & ee->eedo) ^ !!(ee->polarity & EEPOL_EEDO); | ||
| 126 | eeprom_clk_lo(ee); | ||
| 127 | } | ||
| 128 | eeprom_update(ee, ee->eesel, 0 ^ !!(ee->polarity & EEPOL_EESEL)); | ||
| 129 | |||
| 130 | return res; | ||
| 131 | } | ||
| 132 | |||
| 133 | |||
| 134 | void eeprom_writeb(struct eeprom *ee, unsigned address, u8 data) | ||
| 135 | { | ||
| 136 | } | ||
