#include <dm.h>
#include <i2c.h>
-#include <asm/arch/i2c.h>
#include <asm/io.h>
+#include <asm/omap_i2c.h>
-#include "omap24xx_i2c.h"
+/*
+ * Provide access to architecture-specific I2C header files for platforms
+ * that are NOT yet solely relying on CONFIG_DM_I2C, CONFIG_OF_CONTROL, and
+ * the defaults provided in 'omap24xx_i2c.h' for all U-Boot stages where I2C
+ * access is desired.
+ */
+#ifndef CONFIG_ARCH_K3
+#include <asm/arch/i2c.h>
+#endif
-DECLARE_GLOBAL_DATA_PTR;
+#include "omap24xx_i2c.h"
#define I2C_TIMEOUT 1000
/* Absolutely safe for status update at 100 kHz I2C: */
#define I2C_WAIT 200
+enum {
+ OMAP_I2C_REV_REG = 0, /* Only on IP V1 (OMAP34XX) */
+ OMAP_I2C_IE_REG, /* Only on IP V1 (OMAP34XX) */
+ OMAP_I2C_STAT_REG,
+ OMAP_I2C_WE_REG,
+ OMAP_I2C_SYSS_REG,
+ OMAP_I2C_BUF_REG,
+ OMAP_I2C_CNT_REG,
+ OMAP_I2C_DATA_REG,
+ OMAP_I2C_SYSC_REG,
+ OMAP_I2C_CON_REG,
+ OMAP_I2C_OA_REG,
+ OMAP_I2C_SA_REG,
+ OMAP_I2C_PSC_REG,
+ OMAP_I2C_SCLL_REG,
+ OMAP_I2C_SCLH_REG,
+ OMAP_I2C_SYSTEST_REG,
+ OMAP_I2C_BUFSTAT_REG,
+ /* Only on IP V2 (OMAP4430, etc.) */
+ OMAP_I2C_IP_V2_REVNB_LO,
+ OMAP_I2C_IP_V2_REVNB_HI,
+ OMAP_I2C_IP_V2_IRQSTATUS_RAW,
+ OMAP_I2C_IP_V2_IRQENABLE_SET,
+ OMAP_I2C_IP_V2_IRQENABLE_CLR,
+};
+
+static const u8 __maybe_unused reg_map_ip_v1[] = {
+ [OMAP_I2C_REV_REG] = 0x00,
+ [OMAP_I2C_IE_REG] = 0x04,
+ [OMAP_I2C_STAT_REG] = 0x08,
+ [OMAP_I2C_WE_REG] = 0x0c,
+ [OMAP_I2C_SYSS_REG] = 0x10,
+ [OMAP_I2C_BUF_REG] = 0x14,
+ [OMAP_I2C_CNT_REG] = 0x18,
+ [OMAP_I2C_DATA_REG] = 0x1c,
+ [OMAP_I2C_SYSC_REG] = 0x20,
+ [OMAP_I2C_CON_REG] = 0x24,
+ [OMAP_I2C_OA_REG] = 0x28,
+ [OMAP_I2C_SA_REG] = 0x2c,
+ [OMAP_I2C_PSC_REG] = 0x30,
+ [OMAP_I2C_SCLL_REG] = 0x34,
+ [OMAP_I2C_SCLH_REG] = 0x38,
+ [OMAP_I2C_SYSTEST_REG] = 0x3c,
+ [OMAP_I2C_BUFSTAT_REG] = 0x40,
+};
+
+static const u8 __maybe_unused reg_map_ip_v2[] = {
+ [OMAP_I2C_STAT_REG] = 0x28,
+ [OMAP_I2C_WE_REG] = 0x34,
+ [OMAP_I2C_SYSS_REG] = 0x90,
+ [OMAP_I2C_BUF_REG] = 0x94,
+ [OMAP_I2C_CNT_REG] = 0x98,
+ [OMAP_I2C_DATA_REG] = 0x9c,
+ [OMAP_I2C_SYSC_REG] = 0x10,
+ [OMAP_I2C_CON_REG] = 0xa4,
+ [OMAP_I2C_OA_REG] = 0xa8,
+ [OMAP_I2C_SA_REG] = 0xac,
+ [OMAP_I2C_PSC_REG] = 0xb0,
+ [OMAP_I2C_SCLL_REG] = 0xb4,
+ [OMAP_I2C_SCLH_REG] = 0xb8,
+ [OMAP_I2C_SYSTEST_REG] = 0xbc,
+ [OMAP_I2C_BUFSTAT_REG] = 0xc0,
+ [OMAP_I2C_IP_V2_REVNB_LO] = 0x00,
+ [OMAP_I2C_IP_V2_REVNB_HI] = 0x04,
+ [OMAP_I2C_IP_V2_IRQSTATUS_RAW] = 0x24,
+ [OMAP_I2C_IP_V2_IRQENABLE_SET] = 0x2c,
+ [OMAP_I2C_IP_V2_IRQENABLE_CLR] = 0x30,
+};
+
struct omap_i2c {
struct udevice *clk;
+ int ip_rev;
struct i2c *regs;
unsigned int speed;
int waitdelay;
int clk_id;
};
+static inline const u8 *omap_i2c_get_ip_reg_map(int ip_rev)
+{
+ switch (ip_rev) {
+ case OMAP_I2C_REV_V1:
+ return reg_map_ip_v1;
+ case OMAP_I2C_REV_V2:
+ /* Fall through... */
+ default:
+ return reg_map_ip_v2;
+ }
+}
+
+static inline void omap_i2c_write_reg(void __iomem *base, int ip_rev,
+ u16 val, int reg)
+{
+ writew(val, base + omap_i2c_get_ip_reg_map(ip_rev)[reg]);
+}
+
+static inline u16 omap_i2c_read_reg(void __iomem *base, int ip_rev, int reg)
+{
+ return readw(base + omap_i2c_get_ip_reg_map(ip_rev)[reg]);
+}
+
static int omap24_i2c_findpsc(u32 *pscl, u32 *psch, uint speed)
{
unsigned long internal_clk = 0, fclk;
* Wait for the bus to be free by checking the Bus Busy (BB)
* bit to become clear
*/
-static int wait_for_bb(struct i2c *i2c_base, int waitdelay)
+static int wait_for_bb(void __iomem *i2c_base, int ip_rev, int waitdelay)
{
int timeout = I2C_TIMEOUT;
+ int irq_stat_reg;
u16 stat;
- writew(0xFFFF, &i2c_base->stat); /* clear current interrupts...*/
-#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX)
- while ((stat = readw(&i2c_base->stat) & I2C_STAT_BB) && timeout--) {
-#else
- /* Read RAW status */
- while ((stat = readw(&i2c_base->irqstatus_raw) &
+ irq_stat_reg = (ip_rev == OMAP_I2C_REV_V1) ?
+ OMAP_I2C_STAT_REG : OMAP_I2C_IP_V2_IRQSTATUS_RAW;
+
+ /* clear current interrupts */
+ omap_i2c_write_reg(i2c_base, ip_rev, 0xFFFF, OMAP_I2C_STAT_REG);
+
+ while ((stat = omap_i2c_read_reg(i2c_base, ip_rev, irq_stat_reg) &
I2C_STAT_BB) && timeout--) {
-#endif
- writew(stat, &i2c_base->stat);
+ omap_i2c_write_reg(i2c_base, ip_rev, stat, OMAP_I2C_STAT_REG);
udelay(waitdelay);
}
if (timeout <= 0) {
- printf("Timed out in wait_for_bb: status=%04x\n",
- stat);
+ printf("Timed out in %s: status=%04x\n", __func__, stat);
return 1;
}
- writew(0xFFFF, &i2c_base->stat); /* clear delayed stuff*/
+
+ /* clear delayed stuff */
+ omap_i2c_write_reg(i2c_base, ip_rev, 0xFFFF, OMAP_I2C_STAT_REG);
return 0;
}
* Wait for the I2C controller to complete current action
* and update status
*/
-static u16 wait_for_event(struct i2c *i2c_base, int waitdelay)
+static u16 wait_for_event(void __iomem *i2c_base, int ip_rev, int waitdelay)
{
u16 status;
int timeout = I2C_TIMEOUT;
+ int irq_stat_reg;
+ irq_stat_reg = (ip_rev == OMAP_I2C_REV_V1) ?
+ OMAP_I2C_STAT_REG : OMAP_I2C_IP_V2_IRQSTATUS_RAW;
do {
udelay(waitdelay);
-#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX)
- status = readw(&i2c_base->stat);
-#else
- /* Read RAW status */
- status = readw(&i2c_base->irqstatus_raw);
-#endif
+ status = omap_i2c_read_reg(i2c_base, ip_rev, irq_stat_reg);
} while (!(status &
(I2C_STAT_ROVR | I2C_STAT_XUDF | I2C_STAT_XRDY |
I2C_STAT_RRDY | I2C_STAT_ARDY | I2C_STAT_NACK |
I2C_STAT_AL)) && timeout--);
if (timeout <= 0) {
- printf("Timed out in wait_for_event: status=%04x\n",
- status);
+ printf("Timed out in %s: status=%04x\n", __func__, status);
/*
* If status is still 0 here, probably the bus pads have
* not been configured for I2C, and/or pull-ups are missing.
*/
printf("Check if pads/pull-ups of bus are properly configured\n");
- writew(0xFFFF, &i2c_base->stat);
+ omap_i2c_write_reg(i2c_base, ip_rev, 0xFFFF, OMAP_I2C_STAT_REG);
status = 0;
}
return status;
}
-static void flush_fifo(struct i2c *i2c_base)
+static void flush_fifo(void __iomem *i2c_base, int ip_rev)
{
u16 stat;
* you get a bus error
*/
while (1) {
- stat = readw(&i2c_base->stat);
+ stat = omap_i2c_read_reg(i2c_base, ip_rev, OMAP_I2C_STAT_REG);
if (stat == I2C_STAT_RRDY) {
- readb(&i2c_base->data);
- writew(I2C_STAT_RRDY, &i2c_base->stat);
+ omap_i2c_read_reg(i2c_base, ip_rev, OMAP_I2C_DATA_REG);
+ omap_i2c_write_reg(i2c_base, ip_rev,
+ I2C_STAT_RRDY, OMAP_I2C_STAT_REG);
udelay(1000);
} else
break;
}
}
-static int __omap24_i2c_setspeed(struct i2c *i2c_base, uint speed,
+static int __omap24_i2c_setspeed(void __iomem *i2c_base, int ip_rev, uint speed,
int *waitdelay)
{
int psc, fsscll = 0, fssclh = 0;
}
}
- *waitdelay = (10000000 / speed) * 2; /* wait for 20 clkperiods */
- writew(0, &i2c_base->con);
- writew(psc, &i2c_base->psc);
- writew(scll, &i2c_base->scll);
- writew(sclh, &i2c_base->sclh);
- writew(I2C_CON_EN, &i2c_base->con);
- writew(0xFFFF, &i2c_base->stat); /* clear all pending status */
+ /* wait for 20 clkperiods */
+ *waitdelay = (10000000 / speed) * 2;
+
+ omap_i2c_write_reg(i2c_base, ip_rev, 0, OMAP_I2C_CON_REG);
+ omap_i2c_write_reg(i2c_base, ip_rev, psc, OMAP_I2C_PSC_REG);
+ omap_i2c_write_reg(i2c_base, ip_rev, scll, OMAP_I2C_SCLL_REG);
+ omap_i2c_write_reg(i2c_base, ip_rev, sclh, OMAP_I2C_SCLH_REG);
+ omap_i2c_write_reg(i2c_base, ip_rev, I2C_CON_EN, OMAP_I2C_CON_REG);
+
+ /* clear all pending status */
+ omap_i2c_write_reg(i2c_base, ip_rev, 0xFFFF, OMAP_I2C_STAT_REG);
return 0;
}
-static void omap24_i2c_deblock(struct i2c *i2c_base)
+static void omap24_i2c_deblock(void __iomem *i2c_base, int ip_rev)
{
int i;
u16 systest;
u16 orgsystest;
/* set test mode ST_EN = 1 */
- orgsystest = readw(&i2c_base->systest);
+ orgsystest = omap_i2c_read_reg(i2c_base, ip_rev, OMAP_I2C_SYSTEST_REG);
systest = orgsystest;
+
/* enable testmode */
systest |= I2C_SYSTEST_ST_EN;
- writew(systest, &i2c_base->systest);
+ omap_i2c_write_reg(i2c_base, ip_rev, systest, OMAP_I2C_SYSTEST_REG);
systest &= ~I2C_SYSTEST_TMODE_MASK;
systest |= 3 << I2C_SYSTEST_TMODE_SHIFT;
- writew(systest, &i2c_base->systest);
+ omap_i2c_write_reg(i2c_base, ip_rev, systest, OMAP_I2C_SYSTEST_REG);
/* set SCL, SDA = 1 */
systest |= I2C_SYSTEST_SCL_O | I2C_SYSTEST_SDA_O;
- writew(systest, &i2c_base->systest);
+ omap_i2c_write_reg(i2c_base, ip_rev, systest, OMAP_I2C_SYSTEST_REG);
udelay(10);
/* toggle scl 9 clocks */
for (i = 0; i < 9; i++) {
/* SCL = 0 */
systest &= ~I2C_SYSTEST_SCL_O;
- writew(systest, &i2c_base->systest);
+ omap_i2c_write_reg(i2c_base, ip_rev,
+ systest, OMAP_I2C_SYSTEST_REG);
udelay(10);
/* SCL = 1 */
systest |= I2C_SYSTEST_SCL_O;
- writew(systest, &i2c_base->systest);
+ omap_i2c_write_reg(i2c_base, ip_rev,
+ systest, OMAP_I2C_SYSTEST_REG);
udelay(10);
}
/* send stop */
systest &= ~I2C_SYSTEST_SDA_O;
- writew(systest, &i2c_base->systest);
+ omap_i2c_write_reg(i2c_base, ip_rev, systest, OMAP_I2C_SYSTEST_REG);
udelay(10);
systest |= I2C_SYSTEST_SCL_O | I2C_SYSTEST_SDA_O;
- writew(systest, &i2c_base->systest);
+ omap_i2c_write_reg(i2c_base, ip_rev, systest, OMAP_I2C_SYSTEST_REG);
udelay(10);
/* restore original mode */
- writew(orgsystest, &i2c_base->systest);
+ omap_i2c_write_reg(i2c_base, ip_rev, orgsystest, OMAP_I2C_SYSTEST_REG);
}
-static void __omap24_i2c_init(struct i2c *i2c_base, int speed, int slaveadd,
- int *waitdelay)
+static void __omap24_i2c_init(void __iomem *i2c_base, int ip_rev, int speed,
+ int slaveadd, int *waitdelay)
{
int timeout = I2C_TIMEOUT;
int deblock = 1;
retry:
- if (readw(&i2c_base->con) & I2C_CON_EN) {
- writew(0, &i2c_base->con);
+ if (omap_i2c_read_reg(i2c_base, ip_rev, OMAP_I2C_CON_REG) &
+ I2C_CON_EN) {
+ omap_i2c_write_reg(i2c_base, ip_rev, 0, OMAP_I2C_CON_REG);
udelay(50000);
}
- writew(0x2, &i2c_base->sysc); /* for ES2 after soft reset */
+ /* for ES2 after soft reset */
+ omap_i2c_write_reg(i2c_base, ip_rev, 0x2, OMAP_I2C_SYSC_REG);
udelay(1000);
- writew(I2C_CON_EN, &i2c_base->con);
- while (!(readw(&i2c_base->syss) & I2C_SYSS_RDONE) && timeout--) {
+ omap_i2c_write_reg(i2c_base, ip_rev, I2C_CON_EN, OMAP_I2C_CON_REG);
+ while (!(omap_i2c_read_reg(i2c_base, ip_rev, OMAP_I2C_SYSS_REG) &
+ I2C_SYSS_RDONE) && timeout--) {
if (timeout <= 0) {
puts("ERROR: Timeout in soft-reset\n");
return;
udelay(1000);
}
- if (0 != __omap24_i2c_setspeed(i2c_base, speed, waitdelay)) {
+ if (__omap24_i2c_setspeed(i2c_base, ip_rev, speed, waitdelay)) {
printf("ERROR: failed to setup I2C bus-speed!\n");
return;
}
/* own address */
- writew(slaveadd, &i2c_base->oa);
+ omap_i2c_write_reg(i2c_base, ip_rev, slaveadd, OMAP_I2C_OA_REG);
+
+ if (ip_rev == OMAP_I2C_REV_V1) {
+ /*
+ * Have to enable interrupts for OMAP2/3, these IPs don't have
+ * an 'irqstatus_raw' register and we shall have to poll 'stat'
+ */
+ omap_i2c_write_reg(i2c_base, ip_rev, I2C_IE_XRDY_IE |
+ I2C_IE_RRDY_IE | I2C_IE_ARDY_IE |
+ I2C_IE_NACK_IE | I2C_IE_AL_IE,
+ OMAP_I2C_IE_REG);
+ }
-#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX)
- /*
- * Have to enable interrupts for OMAP2/3, these IPs don't have
- * an 'irqstatus_raw' register and we shall have to poll 'stat'
- */
- writew(I2C_IE_XRDY_IE | I2C_IE_RRDY_IE | I2C_IE_ARDY_IE |
- I2C_IE_NACK_IE | I2C_IE_AL_IE, &i2c_base->ie);
-#endif
udelay(1000);
- flush_fifo(i2c_base);
- writew(0xFFFF, &i2c_base->stat);
+ flush_fifo(i2c_base, ip_rev);
+ omap_i2c_write_reg(i2c_base, ip_rev, 0xFFFF, OMAP_I2C_STAT_REG);
/* Handle possible failed I2C state */
- if (wait_for_bb(i2c_base, *waitdelay))
+ if (wait_for_bb(i2c_base, ip_rev, *waitdelay))
if (deblock == 1) {
- omap24_i2c_deblock(i2c_base);
+ omap24_i2c_deblock(i2c_base, ip_rev);
deblock = 0;
goto retry;
}
* i2c_probe: Use write access. Allows to identify addresses that are
* write-only (like the config register of dual-port EEPROMs)
*/
-static int __omap24_i2c_probe(struct i2c *i2c_base, int waitdelay, uchar chip)
+static int __omap24_i2c_probe(void __iomem *i2c_base, int ip_rev, int waitdelay,
+ uchar chip)
{
u16 status;
int res = 1; /* default = fail */
- if (chip == readw(&i2c_base->oa))
+ if (chip == omap_i2c_read_reg(i2c_base, ip_rev, OMAP_I2C_OA_REG))
return res;
/* Wait until bus is free */
- if (wait_for_bb(i2c_base, waitdelay))
+ if (wait_for_bb(i2c_base, ip_rev, waitdelay))
return res;
/* No data transfer, slave addr only */
- writew(chip, &i2c_base->sa);
+ omap_i2c_write_reg(i2c_base, ip_rev, chip, OMAP_I2C_SA_REG);
+
/* Stop bit needed here */
- writew(I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_TRX |
- I2C_CON_STP, &i2c_base->con);
+ omap_i2c_write_reg(i2c_base, ip_rev, I2C_CON_EN | I2C_CON_MST |
+ I2C_CON_STT | I2C_CON_TRX | I2C_CON_STP,
+ OMAP_I2C_CON_REG);
- status = wait_for_event(i2c_base, waitdelay);
+ status = wait_for_event(i2c_base, ip_rev, waitdelay);
if ((status & ~I2C_STAT_XRDY) == 0 || (status & I2C_STAT_AL)) {
/*
res = 0; /* Device found */
udelay(waitdelay);/* Required by AM335X in SPL */
/* Abort transfer (force idle state) */
- writew(I2C_CON_MST | I2C_CON_TRX, &i2c_base->con); /* Reset */
+ omap_i2c_write_reg(i2c_base, ip_rev, I2C_CON_MST | I2C_CON_TRX,
+ OMAP_I2C_CON_REG); /* Reset */
udelay(1000);
- writew(I2C_CON_EN | I2C_CON_MST | I2C_CON_TRX |
- I2C_CON_STP, &i2c_base->con); /* STP */
+ omap_i2c_write_reg(i2c_base, ip_rev, I2C_CON_EN | I2C_CON_MST |
+ I2C_CON_TRX | I2C_CON_STP,
+ OMAP_I2C_CON_REG); /* STP */
}
+
pr_exit:
- flush_fifo(i2c_base);
- writew(0xFFFF, &i2c_base->stat);
+ flush_fifo(i2c_base, ip_rev);
+ omap_i2c_write_reg(i2c_base, ip_rev, 0xFFFF, OMAP_I2C_STAT_REG);
return res;
}
* or that do not need a register address at all (such as some clock
* distributors).
*/
-static int __omap24_i2c_read(struct i2c *i2c_base, int waitdelay, uchar chip,
- uint addr, int alen, uchar *buffer, int len)
+static int __omap24_i2c_read(void __iomem *i2c_base, int ip_rev, int waitdelay,
+ uchar chip, uint addr, int alen, uchar *buffer,
+ int len)
{
int i2c_error = 0;
u16 status;
puts("I2C read: addr len < 0\n");
return 1;
}
+
if (len < 0) {
puts("I2C read: data len < 0\n");
return 1;
}
+
if (buffer == NULL) {
puts("I2C read: NULL pointer passed\n");
return 1;
#endif
/* Wait until bus not busy */
- if (wait_for_bb(i2c_base, waitdelay))
+ if (wait_for_bb(i2c_base, ip_rev, waitdelay))
return 1;
/* Zero, one or two bytes reg address (offset) */
- writew(alen, &i2c_base->cnt);
+ omap_i2c_write_reg(i2c_base, ip_rev, alen, OMAP_I2C_CNT_REG);
/* Set slave address */
- writew(chip, &i2c_base->sa);
+ omap_i2c_write_reg(i2c_base, ip_rev, chip, OMAP_I2C_SA_REG);
if (alen) {
/* Must write reg offset first */
#ifdef CONFIG_I2C_REPEATED_START
/* No stop bit, use Repeated Start (Sr) */
- writew(I2C_CON_EN | I2C_CON_MST | I2C_CON_STT |
- I2C_CON_TRX, &i2c_base->con);
+ omap_i2c_write_reg(i2c_base, ip_rev, I2C_CON_EN | I2C_CON_MST |
+ I2C_CON_STT | I2C_CON_TRX, OMAP_I2C_CON_REG);
#else
/* Stop - Start (P-S) */
- writew(I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_STP |
- I2C_CON_TRX, &i2c_base->con);
+ omap_i2c_write_reg(i2c_base, ip_rev, I2C_CON_EN | I2C_CON_MST |
+ I2C_CON_STT | I2C_CON_STP | I2C_CON_TRX,
+ OMAP_I2C_CON_REG);
#endif
/* Send register offset */
while (1) {
- status = wait_for_event(i2c_base, waitdelay);
+ status = wait_for_event(i2c_base, ip_rev, waitdelay);
/* Try to identify bus that is not padconf'd for I2C */
if (status == I2C_STAT_XRDY) {
i2c_error = 2;
}
if (alen) {
if (status & I2C_STAT_XRDY) {
+ u8 addr_byte;
alen--;
- /* Do we have to use byte access? */
- writeb((addr >> (8 * alen)) & 0xff,
- &i2c_base->data);
- writew(I2C_STAT_XRDY, &i2c_base->stat);
+ addr_byte = (addr >> (8 * alen)) & 0xff;
+ omap_i2c_write_reg(i2c_base, ip_rev,
+ addr_byte,
+ OMAP_I2C_DATA_REG);
+ omap_i2c_write_reg(i2c_base, ip_rev,
+ I2C_STAT_XRDY,
+ OMAP_I2C_STAT_REG);
}
}
if (status & I2C_STAT_ARDY) {
- writew(I2C_STAT_ARDY, &i2c_base->stat);
+ omap_i2c_write_reg(i2c_base, ip_rev,
+ I2C_STAT_ARDY,
+ OMAP_I2C_STAT_REG);
break;
}
}
}
+
/* Set slave address */
- writew(chip, &i2c_base->sa);
+ omap_i2c_write_reg(i2c_base, ip_rev, chip, OMAP_I2C_SA_REG);
/* Read len bytes from slave */
- writew(len, &i2c_base->cnt);
+ omap_i2c_write_reg(i2c_base, ip_rev, len, OMAP_I2C_CNT_REG);
/* Need stop bit here */
- writew(I2C_CON_EN | I2C_CON_MST |
- I2C_CON_STT | I2C_CON_STP,
- &i2c_base->con);
+ omap_i2c_write_reg(i2c_base, ip_rev, I2C_CON_EN | I2C_CON_MST |
+ I2C_CON_STT | I2C_CON_STP, OMAP_I2C_CON_REG);
/* Receive data */
while (1) {
- status = wait_for_event(i2c_base, waitdelay);
+ status = wait_for_event(i2c_base, ip_rev, waitdelay);
/*
* Try to identify bus that is not padconf'd for I2C. This
* state could be left over from previous transactions if
goto rd_exit;
}
if (status & I2C_STAT_RRDY) {
- *buffer++ = readb(&i2c_base->data);
- writew(I2C_STAT_RRDY, &i2c_base->stat);
+ *buffer++ = omap_i2c_read_reg(i2c_base, ip_rev,
+ OMAP_I2C_DATA_REG);
+ omap_i2c_write_reg(i2c_base, ip_rev,
+ I2C_STAT_RRDY, OMAP_I2C_STAT_REG);
}
if (status & I2C_STAT_ARDY) {
- writew(I2C_STAT_ARDY, &i2c_base->stat);
+ omap_i2c_write_reg(i2c_base, ip_rev,
+ I2C_STAT_ARDY, OMAP_I2C_STAT_REG);
break;
}
}
rd_exit:
- flush_fifo(i2c_base);
- writew(0xFFFF, &i2c_base->stat);
+ flush_fifo(i2c_base, ip_rev);
+ omap_i2c_write_reg(i2c_base, ip_rev, 0xFFFF, OMAP_I2C_STAT_REG);
return i2c_error;
}
/* i2c_write: Address (reg offset) may be 0, 1 or 2 bytes long. */
-static int __omap24_i2c_write(struct i2c *i2c_base, int waitdelay, uchar chip,
- uint addr, int alen, uchar *buffer, int len)
+static int __omap24_i2c_write(void __iomem *i2c_base, int ip_rev, int waitdelay,
+ uchar chip, uint addr, int alen, uchar *buffer,
+ int len)
{
int i;
u16 status;
#endif
/* Wait until bus not busy */
- if (wait_for_bb(i2c_base, waitdelay))
+ if (wait_for_bb(i2c_base, ip_rev, waitdelay))
return 1;
/* Start address phase - will write regoffset + len bytes data */
- writew(alen + len, &i2c_base->cnt);
+ omap_i2c_write_reg(i2c_base, ip_rev, alen + len, OMAP_I2C_CNT_REG);
/* Set slave address */
- writew(chip, &i2c_base->sa);
+ omap_i2c_write_reg(i2c_base, ip_rev, chip, OMAP_I2C_SA_REG);
/* Stop bit needed here */
- writew(I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_TRX |
- I2C_CON_STP, &i2c_base->con);
+ omap_i2c_write_reg(i2c_base, ip_rev, I2C_CON_EN | I2C_CON_MST |
+ I2C_CON_STT | I2C_CON_TRX | I2C_CON_STP,
+ OMAP_I2C_CON_REG);
while (alen) {
/* Must write reg offset (one or two bytes) */
- status = wait_for_event(i2c_base, waitdelay);
+ status = wait_for_event(i2c_base, ip_rev, waitdelay);
/* Try to identify bus that is not padconf'd for I2C */
if (status == I2C_STAT_XRDY) {
i2c_error = 2;
}
if (status & I2C_STAT_XRDY) {
alen--;
- writeb((addr >> (8 * alen)) & 0xff, &i2c_base->data);
- writew(I2C_STAT_XRDY, &i2c_base->stat);
+ omap_i2c_write_reg(i2c_base, ip_rev,
+ (addr >> (8 * alen)) & 0xff,
+ OMAP_I2C_DATA_REG);
+ omap_i2c_write_reg(i2c_base, ip_rev,
+ I2C_STAT_XRDY, OMAP_I2C_STAT_REG);
} else {
i2c_error = 1;
printf("i2c_write: bus not ready for addr Tx (status=0x%x)\n",
goto wr_exit;
}
}
+
/* Address phase is over, now write data */
for (i = 0; i < len; i++) {
- status = wait_for_event(i2c_base, waitdelay);
+ status = wait_for_event(i2c_base, ip_rev, waitdelay);
if (status == 0 || (status & I2C_STAT_NACK)) {
i2c_error = 1;
printf("i2c_write: error waiting for data ACK (status=0x%x)\n",
goto wr_exit;
}
if (status & I2C_STAT_XRDY) {
- writeb(buffer[i], &i2c_base->data);
- writew(I2C_STAT_XRDY, &i2c_base->stat);
+ omap_i2c_write_reg(i2c_base, ip_rev,
+ buffer[i], OMAP_I2C_DATA_REG);
+ omap_i2c_write_reg(i2c_base, ip_rev,
+ I2C_STAT_XRDY, OMAP_I2C_STAT_REG);
} else {
i2c_error = 1;
printf("i2c_write: bus not ready for data Tx (i=%d)\n",
goto wr_exit;
}
}
+
/*
* poll ARDY bit for making sure that last byte really has been
* transferred on the bus.
*/
do {
- status = wait_for_event(i2c_base, waitdelay);
+ status = wait_for_event(i2c_base, ip_rev, waitdelay);
} while (!(status & I2C_STAT_ARDY) && timeout--);
if (timeout <= 0)
printf("i2c_write: timed out writig last byte!\n");
wr_exit:
- flush_fifo(i2c_base);
- writew(0xFFFF, &i2c_base->stat);
+ flush_fifo(i2c_base, ip_rev);
+ omap_i2c_write_reg(i2c_base, ip_rev, 0xFFFF, OMAP_I2C_STAT_REG);
return i2c_error;
}
* The legacy I2C functions. These need to get removed once
* all users of this driver are converted to DM.
*/
-static struct i2c *omap24_get_base(struct i2c_adapter *adap)
+static void __iomem *omap24_get_base(struct i2c_adapter *adap)
{
switch (adap->hwadapnr) {
case 0:
- return (struct i2c *)I2C_BASE1;
+ return (void __iomem *)I2C_BASE1;
break;
case 1:
- return (struct i2c *)I2C_BASE2;
+ return (void __iomem *)I2C_BASE2;
break;
-#if (I2C_BUS_MAX > 2)
+#if (CONFIG_SYS_I2C_BUS_MAX > 2)
case 2:
- return (struct i2c *)I2C_BASE3;
+ return (void __iomem *)I2C_BASE3;
break;
-#if (I2C_BUS_MAX > 3)
+#if (CONFIG_SYS_I2C_BUS_MAX > 3)
case 3:
- return (struct i2c *)I2C_BASE4;
+ return (void __iomem *)I2C_BASE4;
break;
-#if (I2C_BUS_MAX > 4)
+#if (CONFIG_SYS_I2C_BUS_MAX > 4)
case 4:
- return (struct i2c *)I2C_BASE5;
+ return (void __iomem *)I2C_BASE5;
break;
#endif
#endif
printf("wrong hwadapnr: %d\n", adap->hwadapnr);
break;
}
+
return NULL;
}
+static int omap24_get_ip_rev(void)
+{
+#ifdef CONFIG_OMAP34XX
+ return OMAP_I2C_REV_V1;
+#else
+ return OMAP_I2C_REV_V2;
+#endif
+}
static int omap24_i2c_read(struct i2c_adapter *adap, uchar chip, uint addr,
int alen, uchar *buffer, int len)
{
- struct i2c *i2c_base = omap24_get_base(adap);
+ void __iomem *i2c_base = omap24_get_base(adap);
+ int ip_rev = omap24_get_ip_rev();
- return __omap24_i2c_read(i2c_base, adap->waitdelay, chip, addr,
+ return __omap24_i2c_read(i2c_base, ip_rev, adap->waitdelay, chip, addr,
alen, buffer, len);
}
-
static int omap24_i2c_write(struct i2c_adapter *adap, uchar chip, uint addr,
int alen, uchar *buffer, int len)
{
- struct i2c *i2c_base = omap24_get_base(adap);
+ void __iomem *i2c_base = omap24_get_base(adap);
+ int ip_rev = omap24_get_ip_rev();
- return __omap24_i2c_write(i2c_base, adap->waitdelay, chip, addr,
+ return __omap24_i2c_write(i2c_base, ip_rev, adap->waitdelay, chip, addr,
alen, buffer, len);
}
static uint omap24_i2c_setspeed(struct i2c_adapter *adap, uint speed)
{
- struct i2c *i2c_base = omap24_get_base(adap);
+ void __iomem *i2c_base = omap24_get_base(adap);
+ int ip_rev = omap24_get_ip_rev();
int ret;
- ret = __omap24_i2c_setspeed(i2c_base, speed, &adap->waitdelay);
+ ret = __omap24_i2c_setspeed(i2c_base, ip_rev, speed, &adap->waitdelay);
if (ret) {
- error("%s: set i2c speed failed\n", __func__);
+ pr_err("%s: set i2c speed failed\n", __func__);
return ret;
}
static void omap24_i2c_init(struct i2c_adapter *adap, int speed, int slaveadd)
{
- struct i2c *i2c_base = omap24_get_base(adap);
+ void __iomem *i2c_base = omap24_get_base(adap);
+ int ip_rev = omap24_get_ip_rev();
- return __omap24_i2c_init(i2c_base, speed, slaveadd, &adap->waitdelay);
+ return __omap24_i2c_init(i2c_base, ip_rev, speed, slaveadd,
+ &adap->waitdelay);
}
static int omap24_i2c_probe(struct i2c_adapter *adap, uchar chip)
{
- struct i2c *i2c_base = omap24_get_base(adap);
+ void __iomem *i2c_base = omap24_get_base(adap);
+ int ip_rev = omap24_get_ip_rev();
- return __omap24_i2c_probe(i2c_base, adap->waitdelay, chip);
+ return __omap24_i2c_probe(i2c_base, ip_rev, adap->waitdelay, chip);
}
#if !defined(CONFIG_SYS_OMAP24_I2C_SPEED1)
CONFIG_SYS_OMAP24_I2C_SPEED1,
CONFIG_SYS_OMAP24_I2C_SLAVE1,
1)
-#if (I2C_BUS_MAX > 2)
+
+#if (CONFIG_SYS_I2C_BUS_MAX > 2)
#if !defined(CONFIG_SYS_OMAP24_I2C_SPEED2)
#define CONFIG_SYS_OMAP24_I2C_SPEED2 CONFIG_SYS_OMAP24_I2C_SPEED
#endif
CONFIG_SYS_OMAP24_I2C_SPEED2,
CONFIG_SYS_OMAP24_I2C_SLAVE2,
2)
-#if (I2C_BUS_MAX > 3)
+#if (CONFIG_SYS_I2C_BUS_MAX > 3)
#if !defined(CONFIG_SYS_OMAP24_I2C_SPEED3)
#define CONFIG_SYS_OMAP24_I2C_SPEED3 CONFIG_SYS_OMAP24_I2C_SPEED
#endif
CONFIG_SYS_OMAP24_I2C_SPEED3,
CONFIG_SYS_OMAP24_I2C_SLAVE3,
3)
-#if (I2C_BUS_MAX > 4)
+#if (CONFIG_SYS_I2C_BUS_MAX > 4)
#if !defined(CONFIG_SYS_OMAP24_I2C_SPEED4)
#define CONFIG_SYS_OMAP24_I2C_SPEED4 CONFIG_SYS_OMAP24_I2C_SPEED
#endif
for (; nmsgs > 0; nmsgs--, msg++) {
debug("i2c_xfer: chip=0x%x, len=0x%x\n", msg->addr, msg->len);
if (msg->flags & I2C_M_RD) {
- ret = __omap24_i2c_read(priv->regs, priv->waitdelay,
+ ret = __omap24_i2c_read(priv->regs, priv->ip_rev,
+ priv->waitdelay,
msg->addr, 0, 0, msg->buf,
msg->len);
} else {
- ret = __omap24_i2c_write(priv->regs, priv->waitdelay,
+ ret = __omap24_i2c_write(priv->regs, priv->ip_rev,
+ priv->waitdelay,
msg->addr, 0, 0, msg->buf,
msg->len);
}
priv->speed = speed;
- return __omap24_i2c_setspeed(priv->regs, speed, &priv->waitdelay);
+ return __omap24_i2c_setspeed(priv->regs, priv->ip_rev, speed,
+ &priv->waitdelay);
}
static int omap_i2c_probe_chip(struct udevice *bus, uint chip_addr,
{
struct omap_i2c *priv = dev_get_priv(bus);
- return __omap24_i2c_probe(priv->regs, priv->waitdelay, chip_addr);
+ return __omap24_i2c_probe(priv->regs, priv->ip_rev, priv->waitdelay,
+ chip_addr);
}
static int omap_i2c_probe(struct udevice *bus)
{
struct omap_i2c *priv = dev_get_priv(bus);
+ struct omap_i2c_platdata *plat = dev_get_platdata(bus);
- __omap24_i2c_init(priv->regs, priv->speed, 0, &priv->waitdelay);
+ priv->speed = plat->speed;
+ priv->regs = map_physmem(plat->base, sizeof(void *),
+ MAP_NOCACHE);
+ priv->ip_rev = plat->ip_rev;
+
+ __omap24_i2c_init(priv->regs, priv->ip_rev, priv->speed, 0,
+ &priv->waitdelay);
return 0;
}
+#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
static int omap_i2c_ofdata_to_platdata(struct udevice *bus)
{
- struct omap_i2c *priv = dev_get_priv(bus);
+ struct omap_i2c_platdata *plat = dev_get_platdata(bus);
- priv->regs = map_physmem(dev_get_addr(bus), sizeof(void *),
- MAP_NOCACHE);
- priv->speed = CONFIG_SYS_OMAP24_I2C_SPEED;
+ plat->base = devfdt_get_addr(bus);
+ plat->speed = dev_read_u32_default(bus, "clock-frequency", 100000);
+ plat->ip_rev = dev_get_driver_data(bus);
return 0;
}
+static const struct udevice_id omap_i2c_ids[] = {
+ { .compatible = "ti,omap3-i2c", .data = OMAP_I2C_REV_V1 },
+ { .compatible = "ti,omap4-i2c", .data = OMAP_I2C_REV_V2 },
+ { }
+};
+#endif
+
static const struct dm_i2c_ops omap_i2c_ops = {
.xfer = omap_i2c_xfer,
.probe_chip = omap_i2c_probe_chip,
.set_bus_speed = omap_i2c_set_bus_speed,
};
-static const struct udevice_id omap_i2c_ids[] = {
- { .compatible = "ti,omap3-i2c" },
- { .compatible = "ti,omap4-i2c" },
- { }
-};
-
U_BOOT_DRIVER(i2c_omap) = {
.name = "i2c_omap",
.id = UCLASS_I2C,
+#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
.of_match = omap_i2c_ids,
.ofdata_to_platdata = omap_i2c_ofdata_to_platdata,
+ .platdata_auto_alloc_size = sizeof(struct omap_i2c_platdata),
+#endif
.probe = omap_i2c_probe,
.priv_auto_alloc_size = sizeof(struct omap_i2c),
.ops = &omap_i2c_ops,
+#if !CONFIG_IS_ENABLED(OF_CONTROL)
.flags = DM_FLAG_PRE_RELOC,
+#endif
};
#endif /* CONFIG_DM_I2C */
projects / oweals / u-boot.git / blobdiff