diff options
Diffstat (limited to 'cpu/arm920t')
| -rw-r--r-- | cpu/arm920t/at91rm9200/i2c.c | 10 | ||||
| -rw-r--r-- | cpu/arm920t/imx/interrupts.c | 2 | ||||
| -rw-r--r-- | cpu/arm920t/imx/serial.c | 56 | ||||
| -rw-r--r-- | cpu/arm920t/start.S | 6 |
4 files changed, 56 insertions, 18 deletions
diff --git a/cpu/arm920t/at91rm9200/i2c.c b/cpu/arm920t/at91rm9200/i2c.c index 826cea8..90f95df 100644 --- a/cpu/arm920t/at91rm9200/i2c.c +++ b/cpu/arm920t/at91rm9200/i2c.c @@ -203,4 +203,14 @@ void i2c_reg_write(uchar i2c_addr, uchar reg, uchar val) i2c_write(i2c_addr, reg, 1, &val, 1); } +int i2c_set_bus_speed(unsigned int speed) +{ + return -1; +} + +unsigned int i2c_get_bus_speed(void) +{ + return CFG_I2C_SPEED; +} + #endif /* CONFIG_HARD_I2C */ diff --git a/cpu/arm920t/imx/interrupts.c b/cpu/arm920t/imx/interrupts.c index 03ce06d..c61d3bc 100644 --- a/cpu/arm920t/imx/interrupts.c +++ b/cpu/arm920t/imx/interrupts.c @@ -60,7 +60,7 @@ void reset_timer (void) ulong get_timer (ulong base) { - return get_timer_masked (); + return get_timer_masked() - base; } void set_timer (ulong t) diff --git a/cpu/arm920t/imx/serial.c b/cpu/arm920t/imx/serial.c index 6c56acb..85f1167 100644 --- a/cpu/arm920t/imx/serial.c +++ b/cpu/arm920t/imx/serial.c @@ -52,6 +52,8 @@ struct imx_serial { volatile uint32_t uts; }; +DECLARE_GLOBAL_DATA_PTR; + void serial_setbrg (void) { serial_init(); @@ -67,6 +69,9 @@ extern void imx_gpio_mode(int gpio_mode); int serial_init (void) { volatile struct imx_serial* base = (struct imx_serial *)UART_BASE; + unsigned int ufcr_rfdiv; + unsigned int refclk; + #ifdef CONFIG_IMX_SERIAL1 imx_gpio_mode(PC11_PF_UART1_TXD); imx_gpio_mode(PC12_PF_UART1_RXD); @@ -95,11 +100,33 @@ int serial_init (void) /* Configure FIFOs */ base->ufcr = 0xa81; + /* set the baud rate. + * + * baud * 16 x + * --------- = - + * refclk y + * + * x - 1 = UBIR + * y - 1 = UBMR + * + * each register is 16 bits wide. refclk max is 96 MHz + * + */ + + ufcr_rfdiv = ((base->ufcr) & UFCR_RFDIV) >> 7; + if (ufcr_rfdiv == 6) + ufcr_rfdiv = 7; + else + ufcr_rfdiv = 6 - ufcr_rfdiv; + + refclk = get_PERCLK1(); + refclk /= ufcr_rfdiv; + /* Set the numerator value minus one of the BRM ratio */ - base->ubir = (CONFIG_BAUDRATE / 100) - 1; + base->ubir = (gd->baudrate / 100) - 1; /* Set the denominator value minus one of the BRM ratio */ - base->ubmr = 10000 - 1; + base->ubmr = (refclk/(16 * 100)) - 1; /* Set to 8N1 */ base->ucr2 &= ~UCR2_PREN; @@ -117,22 +144,21 @@ int serial_init (void) /* Clear status flags */ base->usr2 |= USR2_ADET | - USR2_DTRF | - USR2_IDLE | - USR2_IRINT | - USR2_WAKE | - USR2_RTSF | - USR2_BRCD | - USR2_ORE | - USR2_RDR; + USR2_DTRF | + USR2_IDLE | + USR2_IRINT | + USR2_WAKE | + USR2_RTSF | + USR2_BRCD | + USR2_ORE; /* Clear status flags */ base->usr1 |= USR1_PARITYERR | - USR1_RTSD | - USR1_ESCF | - USR1_FRAMERR | - USR1_AIRINT | - USR1_AWAKE; + USR1_RTSD | + USR1_ESCF | + USR1_FRAMERR | + USR1_AIRINT | + USR1_AWAKE; return (0); } diff --git a/cpu/arm920t/start.S b/cpu/arm920t/start.S index 62231f8..5d0fec6 100644 --- a/cpu/arm920t/start.S +++ b/cpu/arm920t/start.S @@ -315,7 +315,8 @@ cpu_init_crit: sub sp, sp, #S_FRAME_SIZE stmia sp, {r0 - r12} @ Calling r0-r12 ldr r2, _armboot_start - sub r2, r2, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN) + sub r2, r2, #(CONFIG_STACKSIZE) + sub r2, r2, #(CFG_MALLOC_LEN) sub r2, r2, #(CFG_GBL_DATA_SIZE+8) @ set base 2 words into abort stack ldmia r2, {r2 - r3} @ get pc, cpsr add r0, sp, #S_FRAME_SIZE @ restore sp_SVC @@ -348,7 +349,8 @@ cpu_init_crit: .macro get_bad_stack ldr r13, _armboot_start @ setup our mode stack - sub r13, r13, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN) + sub r13, r13, #(CONFIG_STACKSIZE) + sub r13, r13, #(CFG_MALLOC_LEN) sub r13, r13, #(CFG_GBL_DATA_SIZE+8) @ reserved a couple spots in abort stack str lr, [r13] @ save caller lr / spsr |