diff options
Diffstat (limited to 'drivers/serial/serial_xuartlite.c')
| -rw-r--r-- | drivers/serial/serial_xuartlite.c | 194 |
1 files changed, 87 insertions, 107 deletions
diff --git a/drivers/serial/serial_xuartlite.c b/drivers/serial/serial_xuartlite.c index 988438e7547..a2e93039257 100644 --- a/drivers/serial/serial_xuartlite.c +++ b/drivers/serial/serial_xuartlite.c @@ -1,5 +1,5 @@ /* - * (C) Copyright 2008-2011 Michal Simek <monstr@monstr.eu> + * (C) Copyright 2008 - 2015 Michal Simek <monstr@monstr.eu> * Clean driver and add xilinx constant from header file * * (C) Copyright 2004 Atmark Techno, Inc. @@ -10,13 +10,17 @@ #include <config.h> #include <common.h> +#include <dm.h> #include <asm/io.h> #include <linux/compiler.h> #include <serial.h> -#define SR_TX_FIFO_FULL 0x08 /* transmit FIFO full */ -#define SR_RX_FIFO_VALID_DATA 0x01 /* data in receive FIFO */ -#define SR_RX_FIFO_FULL 0x02 /* receive FIFO full */ +DECLARE_GLOBAL_DATA_PTR; + +#define SR_TX_FIFO_FULL BIT(3) /* transmit FIFO full */ +#define SR_TX_FIFO_EMPTY BIT(2) /* transmit FIFO empty */ +#define SR_RX_FIFO_VALID_DATA BIT(0) /* data in receive FIFO */ +#define SR_RX_FIFO_FULL BIT(1) /* receive FIFO full */ #define ULITE_CONTROL_RST_TX 0x01 #define ULITE_CONTROL_RST_RX 0x02 @@ -28,135 +32,111 @@ struct uartlite { unsigned int control; }; -static struct uartlite *userial_ports[4] = { -#ifdef XILINX_UARTLITE_BASEADDR - [0] = (struct uartlite *)XILINX_UARTLITE_BASEADDR, -#endif -#ifdef XILINX_UARTLITE_BASEADDR1 - [1] = (struct uartlite *)XILINX_UARTLITE_BASEADDR1, -#endif -#ifdef XILINX_UARTLITE_BASEADDR2 - [2] = (struct uartlite *)XILINX_UARTLITE_BASEADDR2, -#endif -#ifdef XILINX_UARTLITE_BASEADDR3 - [3] = (struct uartlite *)XILINX_UARTLITE_BASEADDR3 -#endif +struct uartlite_platdata { + struct uartlite *regs; }; -static void uartlite_serial_putc(const char c, const int port) +static int uartlite_serial_putc(struct udevice *dev, const char ch) { - struct uartlite *regs = userial_ports[port]; + struct uartlite_platdata *plat = dev_get_platdata(dev); + struct uartlite *regs = plat->regs; - if (c == '\n') - uartlite_serial_putc('\r', port); + if (in_be32(®s->status) & SR_TX_FIFO_FULL) + return -EAGAIN; - while (in_be32(®s->status) & SR_TX_FIFO_FULL) - ; - out_be32(®s->tx_fifo, c & 0xff); -} + out_be32(®s->tx_fifo, ch & 0xff); -static void uartlite_serial_puts(const char *s, const int port) -{ - while (*s) - uartlite_serial_putc(*s++, port); + return 0; } -static int uartlite_serial_getc(const int port) +static int uartlite_serial_getc(struct udevice *dev) { - struct uartlite *regs = userial_ports[port]; + struct uartlite_platdata *plat = dev_get_platdata(dev); + struct uartlite *regs = plat->regs; + + if (!(in_be32(®s->status) & SR_RX_FIFO_VALID_DATA)) + return -EAGAIN; - while (!(in_be32(®s->status) & SR_RX_FIFO_VALID_DATA)) - ; return in_be32(®s->rx_fifo) & 0xff; } -static int uartlite_serial_tstc(const int port) +static int uartlite_serial_pending(struct udevice *dev, bool input) { - struct uartlite *regs = userial_ports[port]; + struct uartlite_platdata *plat = dev_get_platdata(dev); + struct uartlite *regs = plat->regs; + + if (input) + return in_be32(®s->status) & SR_RX_FIFO_VALID_DATA; - return in_be32(®s->status) & SR_RX_FIFO_VALID_DATA; + return !(in_be32(®s->status) & SR_TX_FIFO_EMPTY); } -static int uartlite_serial_init(const int port) +static int uartlite_serial_probe(struct udevice *dev) { - struct uartlite *regs = userial_ports[port]; + struct uartlite_platdata *plat = dev_get_platdata(dev); + struct uartlite *regs = plat->regs; - if (regs) { - out_be32(®s->control, 0); - out_be32(®s->control, - ULITE_CONTROL_RST_RX | ULITE_CONTROL_RST_TX); - in_be32(®s->control); - return 0; - } + out_be32(®s->control, 0); + out_be32(®s->control, ULITE_CONTROL_RST_RX | ULITE_CONTROL_RST_TX); + in_be32(®s->control); - return -1; + return 0; } -/* Multi serial device functions */ -#define DECLARE_ESERIAL_FUNCTIONS(port) \ - static int userial##port##_init(void) \ - { return uartlite_serial_init(port); } \ - static void userial##port##_setbrg(void) {} \ - static int userial##port##_getc(void) \ - { return uartlite_serial_getc(port); } \ - static int userial##port##_tstc(void) \ - { return uartlite_serial_tstc(port); } \ - static void userial##port##_putc(const char c) \ - { uartlite_serial_putc(c, port); } \ - static void userial##port##_puts(const char *s) \ - { uartlite_serial_puts(s, port); } - -/* Serial device descriptor */ -#define INIT_ESERIAL_STRUCTURE(port, __name) { \ - .name = __name, \ - .start = userial##port##_init, \ - .stop = NULL, \ - .setbrg = userial##port##_setbrg, \ - .getc = userial##port##_getc, \ - .tstc = userial##port##_tstc, \ - .putc = userial##port##_putc, \ - .puts = userial##port##_puts, \ +static int uartlite_serial_ofdata_to_platdata(struct udevice *dev) +{ + struct uartlite_platdata *plat = dev_get_platdata(dev); + + plat->regs = (struct uartlite *)dev_get_addr(dev); + + return 0; } -DECLARE_ESERIAL_FUNCTIONS(0); -struct serial_device uartlite_serial0_device = - INIT_ESERIAL_STRUCTURE(0, "ttyUL0"); -DECLARE_ESERIAL_FUNCTIONS(1); -struct serial_device uartlite_serial1_device = - INIT_ESERIAL_STRUCTURE(1, "ttyUL1"); -DECLARE_ESERIAL_FUNCTIONS(2); -struct serial_device uartlite_serial2_device = - INIT_ESERIAL_STRUCTURE(2, "ttyUL2"); -DECLARE_ESERIAL_FUNCTIONS(3); -struct serial_device uartlite_serial3_device = - INIT_ESERIAL_STRUCTURE(3, "ttyUL3"); - -__weak struct serial_device *default_serial_console(void) +static const struct dm_serial_ops uartlite_serial_ops = { + .putc = uartlite_serial_putc, + .pending = uartlite_serial_pending, + .getc = uartlite_serial_getc, +}; + +static const struct udevice_id uartlite_serial_ids[] = { + { .compatible = "xlnx,opb-uartlite-1.00.b", }, + { .compatible = "xlnx,xps-uartlite-1.00.a" }, + { } +}; + +U_BOOT_DRIVER(serial_uartlite) = { + .name = "serial_uartlite", + .id = UCLASS_SERIAL, + .of_match = uartlite_serial_ids, + .ofdata_to_platdata = uartlite_serial_ofdata_to_platdata, + .platdata_auto_alloc_size = sizeof(struct uartlite_platdata), + .probe = uartlite_serial_probe, + .ops = &uartlite_serial_ops, + .flags = DM_FLAG_PRE_RELOC, +}; + +#ifdef CONFIG_DEBUG_UART_UARTLITE + +#include <debug_uart.h> + +static inline void _debug_uart_init(void) { - if (userial_ports[0]) - return &uartlite_serial0_device; - if (userial_ports[1]) - return &uartlite_serial1_device; - if (userial_ports[2]) - return &uartlite_serial2_device; - if (userial_ports[3]) - return &uartlite_serial3_device; - - return NULL; + struct uartlite *regs = (struct uartlite *)CONFIG_DEBUG_UART_BASE; + + out_be32(®s->control, 0); + out_be32(®s->control, ULITE_CONTROL_RST_RX | ULITE_CONTROL_RST_TX); + in_be32(®s->control); } -void uartlite_serial_initialize(void) +static inline void _debug_uart_putc(int ch) { -#ifdef XILINX_UARTLITE_BASEADDR - serial_register(&uartlite_serial0_device); -#endif /* XILINX_UARTLITE_BASEADDR */ -#ifdef XILINX_UARTLITE_BASEADDR1 - serial_register(&uartlite_serial1_device); -#endif /* XILINX_UARTLITE_BASEADDR1 */ -#ifdef XILINX_UARTLITE_BASEADDR2 - serial_register(&uartlite_serial2_device); -#endif /* XILINX_UARTLITE_BASEADDR2 */ -#ifdef XILINX_UARTLITE_BASEADDR3 - serial_register(&uartlite_serial3_device); -#endif /* XILINX_UARTLITE_BASEADDR3 */ + struct uartlite *regs = (struct uartlite *)CONFIG_DEBUG_UART_BASE; + + while (in_be32(®s->status) & SR_TX_FIFO_FULL) + ; + + out_be32(®s->tx_fifo, ch & 0xff); } + +DEBUG_UART_FUNCS +#endif |