Signed-off-by: Stefan Roese sr@denx.de Cc: Nadav Haklai nadavh@marvell.com Cc: Kostya Porotchkin kostap@marvell.com Cc: Wilson Ding dingwei@marvell.com Cc: Victor Gu xigu@marvell.com Cc: Hua Jing jinghua@marvell.com Cc: Terry Zhou bjzhou@marvell.com Cc: Hanna Hawa hannah@marvell.com Cc: Haim Boot hayim@marvell.com Cc: Heiko Schocher hs@denx.de --- drivers/i2c/mv_i2c.c | 184 +++++++++++++++++++++++++++++++++++++-------------- 1 file changed, 136 insertions(+), 48 deletions(-)
diff --git a/drivers/i2c/mv_i2c.c b/drivers/i2c/mv_i2c.c index 30b986e..341126a 100644 --- a/drivers/i2c/mv_i2c.c +++ b/drivers/i2c/mv_i2c.c @@ -18,6 +18,7 @@ */
#include <common.h> +#include <dm.h> #include <i2c.h> #include <asm/io.h> #include "mv_i2c.h" @@ -30,6 +31,16 @@ struct mv_i2c_msg { u8 data; };
+#ifdef CONFIG_ARMADA_3700 +/* Armada 3700 has no padding between the registers */ +struct mv_i2c { + u32 ibmr; + u32 idbr; + u32 icr; + u32 isr; + u32 isar; +}; +#else struct mv_i2c { u32 ibmr; u32 pad0; @@ -41,6 +52,15 @@ struct mv_i2c { u32 pad3; u32 isar; }; +#endif + +/* + * Dummy implementation that can be overwritten by a board + * specific function + */ +__weak void i2c_clk_enable(void) +{ +}
/* * i2c_reset: - reset the host controller @@ -210,37 +230,13 @@ i2c_transfer_finish: return ret; }
-static int __i2c_probe_chip(struct mv_i2c *base, uchar chip) -{ - struct mv_i2c_msg msg; - - i2c_reset(base); - - msg.condition = I2C_COND_START; - msg.acknack = I2C_ACKNAK_WAITACK; - msg.direction = I2C_WRITE; - msg.data = (chip << 1) + 1; - if (i2c_transfer(base, &msg)) - return -1; - - msg.condition = I2C_COND_STOP; - msg.acknack = I2C_ACKNAK_SENDNAK; - msg.direction = I2C_READ; - msg.data = 0x00; - if (i2c_transfer(base, &msg)) - return -1; - - return 0; -} - -static int __i2c_read(struct mv_i2c *base, uchar chip, uint addr, int alen, +static int __i2c_read(struct mv_i2c *base, uchar chip, u8 *addr, int alen, uchar *buffer, int len) { struct mv_i2c_msg msg; - u8 addr_bytes[3]; /* lowest...highest byte of data address */
debug("i2c_read(chip=0x%02x, addr=0x%02x, alen=0x%02x, " - "len=0x%02x)\n", chip, addr, alen, len); + "len=0x%02x)\n", chip, *addr, alen, len);
i2c_reset(base);
@@ -258,17 +254,13 @@ static int __i2c_read(struct mv_i2c *base, uchar chip, uint addr, int alen, * send memory address bytes; * alen defines how much bytes we have to send. */ - /*addr &= ((1 << CONFIG_SYS_EEPROM_PAGE_WRITE_BITS)-1); */ - addr_bytes[0] = (u8)((addr >> 0) & 0x000000FF); - addr_bytes[1] = (u8)((addr >> 8) & 0x000000FF); - addr_bytes[2] = (u8)((addr >> 16) & 0x000000FF); - while (--alen >= 0) { - debug("i2c_read: send memory word address byte %1d\n", alen); + debug("i2c_read: send address byte %02x (alen=%d)\n", + *addr, alen); msg.condition = I2C_COND_NORMAL; msg.acknack = I2C_ACKNAK_WAITACK; msg.direction = I2C_WRITE; - msg.data = addr_bytes[alen]; + msg.data = *(addr++); if (i2c_transfer(base, &msg)) return -1; } @@ -299,8 +291,8 @@ static int __i2c_read(struct mv_i2c *base, uchar chip, uint addr, int alen, return -1;
*buffer = msg.data; - debug("i2c_read: reading byte (0x%08x)=0x%02x\n", - (unsigned int)buffer, *buffer); + debug("i2c_read: reading byte (%p)=0x%02x\n", + buffer, *buffer); buffer++; }
@@ -309,14 +301,13 @@ static int __i2c_read(struct mv_i2c *base, uchar chip, uint addr, int alen, return 0; }
-static int __i2c_write(struct mv_i2c *base, uchar chip, uint addr, int alen, +static int __i2c_write(struct mv_i2c *base, uchar chip, u8 *addr, int alen, uchar *buffer, int len) { struct mv_i2c_msg msg; - u8 addr_bytes[3]; /* lowest...highest byte of data address */
debug("i2c_write(chip=0x%02x, addr=0x%02x, alen=0x%02x, " - "len=0x%02x)\n", chip, addr, alen, len); + "len=0x%02x)\n", chip, *addr, alen, len);
i2c_reset(base);
@@ -334,24 +325,21 @@ static int __i2c_write(struct mv_i2c *base, uchar chip, uint addr, int alen, * send memory address bytes; * alen defines how much bytes we have to send. */ - addr_bytes[0] = (u8)((addr >> 0) & 0x000000FF); - addr_bytes[1] = (u8)((addr >> 8) & 0x000000FF); - addr_bytes[2] = (u8)((addr >> 16) & 0x000000FF); - while (--alen >= 0) { - debug("i2c_write: send memory word address\n"); + debug("i2c_read: send address byte %02x (alen=%d)\n", + *addr, alen); msg.condition = I2C_COND_NORMAL; msg.acknack = I2C_ACKNAK_WAITACK; msg.direction = I2C_WRITE; - msg.data = addr_bytes[alen]; + msg.data = *(addr++); if (i2c_transfer(base, &msg)) return -1; }
/* write bytes; send NACK at last byte */ while (len--) { - debug("i2c_write: writing byte (0x%08x)=0x%02x\n", - (unsigned int)buffer, *buffer); + debug("i2c_write: writing byte (%p)=0x%02x\n", + buffer, *buffer);
if (len == 0) msg.condition = I2C_COND_STOP; @@ -371,6 +359,8 @@ static int __i2c_write(struct mv_i2c *base, uchar chip, uint addr, int alen, return 0; }
+#ifndef CONFIG_DM_I2C + static struct mv_i2c *base_glob;
static void i2c_board_init(struct mv_i2c *base) @@ -436,6 +426,29 @@ void i2c_init(int speed, int slaveaddr) i2c_board_init(base_glob); }
+static int __i2c_probe_chip(struct mv_i2c *base, uchar chip) +{ + struct mv_i2c_msg msg; + + i2c_reset(base); + + msg.condition = I2C_COND_START; + msg.acknack = I2C_ACKNAK_WAITACK; + msg.direction = I2C_WRITE; + msg.data = (chip << 1) + 1; + if (i2c_transfer(base, &msg)) + return -1; + + msg.condition = I2C_COND_STOP; + msg.acknack = I2C_ACKNAK_SENDNAK; + msg.direction = I2C_READ; + msg.data = 0x00; + if (i2c_transfer(base, &msg)) + return -1; + + return 0; +} + /* * i2c_probe: - Test if a chip answers for a given i2c address * @@ -462,7 +475,14 @@ int i2c_probe(uchar chip) */ int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len) { - return __i2c_read(base_glob, chip, addr, alen, buffer, len); + u8 addr_bytes[4]; + + addr_bytes[0] = (addr >> 0) & 0xFF; + addr_bytes[1] = (addr >> 8) & 0xFF; + addr_bytes[2] = (addr >> 16) & 0xFF; + addr_bytes[3] = (addr >> 24) & 0xFF; + + return __i2c_read(base_glob, chip, addr_bytes, alen, buffer, len); }
/* @@ -480,5 +500,73 @@ int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len) */ int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len) { - return __i2c_write(base_glob, chip, addr, alen, buffer, len); + u8 addr_bytes[4]; + + addr_bytes[0] = (addr >> 0) & 0xFF; + addr_bytes[1] = (addr >> 8) & 0xFF; + addr_bytes[2] = (addr >> 16) & 0xFF; + addr_bytes[3] = (addr >> 24) & 0xFF; + + return __i2c_write(base_glob, chip, addr_bytes, alen, buffer, len); +} + +#else /* CONFIG_DM_I2C */ + +struct mv_i2c_priv { + struct mv_i2c *base; +}; + +static int mv_i2c_xfer(struct udevice *bus, struct i2c_msg *msg, int nmsgs) +{ + struct mv_i2c_priv *i2c = dev_get_priv(bus); + struct i2c_msg *dmsg, *omsg, dummy; + + memset(&dummy, 0, sizeof(struct i2c_msg)); + + /* + * We expect either two messages (one with an offset and one with the + * actual data) or one message (just data or offset/data combined) + */ + if (nmsgs > 2 || nmsgs == 0) { + debug("%s: Only one or two messages are supported.", __func__); + return -1; + } + + omsg = nmsgs == 1 ? &dummy : msg; + dmsg = nmsgs == 1 ? msg : msg + 1; + + if (dmsg->flags & I2C_M_RD) + return __i2c_read(i2c->base, dmsg->addr, omsg->buf, + omsg->len, dmsg->buf, dmsg->len); + else + return __i2c_write(i2c->base, dmsg->addr, omsg->buf, + omsg->len, dmsg->buf, dmsg->len); } + +static int mv_i2c_probe(struct udevice *bus) +{ + struct mv_i2c_priv *priv = dev_get_priv(bus); + + priv->base = (void *)dev_get_addr_ptr(bus); + + return 0; +} + +static const struct dm_i2c_ops mv_i2c_ops = { + .xfer = mv_i2c_xfer, +}; + +static const struct udevice_id mv_i2c_ids[] = { + { .compatible = "marvell,armada-3700-i2c" }, + { } +}; + +U_BOOT_DRIVER(i2c_mv) = { + .name = "i2c_mv", + .id = UCLASS_I2C, + .of_match = mv_i2c_ids, + .probe = mv_i2c_probe, + .priv_auto_alloc_size = sizeof(struct mv_i2c_priv), + .ops = &mv_i2c_ops, +}; +#endif /* CONFIG_DM_I2C */