diff options
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/Kconfig | 65 | ||||
| -rw-r--r-- | drivers/serial/Makefile | 2 | ||||
| -rw-r--r-- | drivers/serial/ns16550.c | 98 | ||||
| -rw-r--r-- | drivers/serial/serial-uclass.c | 16 | ||||
| -rw-r--r-- | drivers/serial/serial.c | 2 | ||||
| -rw-r--r-- | drivers/serial/serial_ks8695.c | 121 | ||||
| -rw-r--r-- | drivers/serial/serial_ppc.c | 40 | ||||
| -rw-r--r-- | drivers/serial/serial_sh.c | 321 | ||||
| -rw-r--r-- | drivers/serial/serial_sh.h | 30 |
9 files changed, 436 insertions, 259 deletions
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index a0b6e02..1686a1f 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -2,8 +2,69 @@ config DM_SERIAL bool "Enable Driver Model for serial drivers" depends on DM help - If you want to use driver model for serial drivers, say Y. - To use legacy serial drivers, say N. + Enable driver model for serial. This replaces + drivers/serial/serial.c with the serial uclass, which + implements serial_putc() etc. The uclass interface is + defined in include/serial.h. + +config DEBUG_UART + bool "Enable an early debug UART for debugging" + help + The debug UART is intended for use very early in U-Boot to debug + problems when an ICE or other debug mechanism is not available. + + To use it you should: + - Make sure your UART supports this interface + - Enable CONFIG_DEBUG_UART + - Enable the CONFIG for your UART to tell it to provide this interface + (e.g. CONFIG_DEBUG_UART_NS16550) + - Define the required settings as needed (see below) + - Call debug_uart_init() before use + - Call debug_uart_putc() to output a character + + Depending on your platform it may be possible to use this UART before + a stack is available. + + If your UART does not support this interface you can probably add + support quite easily. Remember that you cannot use driver model and + it is preferred to use no stack. + + You must not use this UART once driver model is working and the + serial drivers are up and running (done in serial_init()). Otherwise + the drivers may conflict and you will get strange output. + +choice + prompt "Select which UART will provide the debug UART" + depends on DEBUG_UART + +config DEBUG_UART_NS16550 + bool "ns16550" + help + Select this to enable a debug UART using the ns16550 driver. You + will need to provide parameters to make this work. The driver will + be available until the real driver model serial is running. + +endchoice + +config DEBUG_UART_BASE + hex "Base address of UART" + depends on DEBUG_UART + help + This is the base address of your UART for memory-mapped UARTs. + + A default should be provided by your board, but if not you will need + to use the correct value here. + +config DEBUG_UART_CLOCK + int "UART input clock" + depends on DEBUG_UART + help + The UART input clock determines the speed of the internal UART + circuitry. The baud rate is derived from this by dividing the input + clock down. + + A default should be provided by your board, but if not you will need + to use the correct value here. config UNIPHIER_SERIAL bool "UniPhier on-chip UART support" diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index 4cc00cd..b385852 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -8,6 +8,7 @@ ifdef CONFIG_DM_SERIAL obj-y += serial-uclass.o obj-$(CONFIG_PL01X_SERIAL) += serial_pl01x.o +obj-$(CONFIG_PPC) += serial_ppc.o else obj-y += serial.o obj-$(CONFIG_PL010_SERIAL) += serial_pl01x.o @@ -26,7 +27,6 @@ obj-$(CONFIG_OPENCORES_YANU) += opencores_yanu.o obj-$(CONFIG_SYS_NS16550) += ns16550.o obj-$(CONFIG_S5P) += serial_s5p.o obj-$(CONFIG_IMX_SERIAL) += serial_imx.o -obj-$(CONFIG_KS8695_SERIAL) += serial_ks8695.o obj-$(CONFIG_MAX3100_SERIAL) += serial_max3100.o obj-$(CONFIG_MXC_UART) += serial_mxc.o obj-$(CONFIG_PXA_SERIAL) += serial_pxa.o diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c index 70c9462..eb00f1c 100644 --- a/drivers/serial/ns16550.c +++ b/drivers/serial/ns16550.c @@ -55,17 +55,9 @@ DECLARE_GLOBAL_DATA_PTR; #endif /* CONFIG_SYS_NS16550_IER */ #ifdef CONFIG_DM_SERIAL -static void ns16550_writeb(NS16550_t port, int offset, int value) -{ - struct ns16550_platdata *plat = port->plat; - unsigned char *addr; - offset *= 1 << plat->reg_shift; - addr = map_sysmem(plat->base, 0) + offset; - /* - * As far as we know it doesn't make sense to support selection of - * these options at run-time, so use the existing CONFIG options. - */ +static inline void serial_out_shift(unsigned char *addr, int shift, int value) +{ #ifdef CONFIG_SYS_NS16550_PORT_MAPPED outb(value, (ulong)addr); #elif defined(CONFIG_SYS_NS16550_MEM32) && !defined(CONFIG_SYS_BIG_ENDIAN) @@ -73,19 +65,14 @@ static void ns16550_writeb(NS16550_t port, int offset, int value) #elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_BIG_ENDIAN) out_be32(addr, value); #elif defined(CONFIG_SYS_BIG_ENDIAN) - writeb(value, addr + (1 << plat->reg_shift) - 1); + writeb(value, addr + (1 << shift) - 1); #else writeb(value, addr); #endif } -static int ns16550_readb(NS16550_t port, int offset) +static inline int serial_in_shift(unsigned char *addr, int shift) { - struct ns16550_platdata *plat = port->plat; - unsigned char *addr; - - offset *= 1 << plat->reg_shift; - addr = map_sysmem(plat->base, 0) + offset; #ifdef CONFIG_SYS_NS16550_PORT_MAPPED return inb((ulong)addr); #elif defined(CONFIG_SYS_NS16550_MEM32) && !defined(CONFIG_SYS_BIG_ENDIAN) @@ -93,12 +80,37 @@ static int ns16550_readb(NS16550_t port, int offset) #elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_BIG_ENDIAN) return in_be32(addr); #elif defined(CONFIG_SYS_BIG_ENDIAN) - return readb(addr + (1 << plat->reg_shift) - 1); + return readb(addr + (1 << reg_shift) - 1); #else return readb(addr); #endif } +static void ns16550_writeb(NS16550_t port, int offset, int value) +{ + struct ns16550_platdata *plat = port->plat; + unsigned char *addr; + + offset *= 1 << plat->reg_shift; + addr = map_sysmem(plat->base, 0) + offset; + /* + * As far as we know it doesn't make sense to support selection of + * these options at run-time, so use the existing CONFIG options. + */ + serial_out_shift(addr, plat->reg_shift, value); +} + +static int ns16550_readb(NS16550_t port, int offset) +{ + struct ns16550_platdata *plat = port->plat; + unsigned char *addr; + + offset *= 1 << plat->reg_shift; + addr = map_sysmem(plat->base, 0) + offset; + + return serial_in_shift(addr, plat->reg_shift); +} + /* We can clean these up once everything is moved to driver model */ #define serial_out(value, addr) \ ns16550_writeb(com_port, addr - (unsigned char *)com_port, value) @@ -106,10 +118,15 @@ static int ns16550_readb(NS16550_t port, int offset) ns16550_readb(com_port, addr - (unsigned char *)com_port) #endif -int ns16550_calc_divisor(NS16550_t port, int clock, int baudrate) +static inline int calc_divisor(NS16550_t port, int clock, int baudrate) { const unsigned int mode_x_div = 16; + return DIV_ROUND_CLOSEST(clock, mode_x_div * baudrate); +} + +int ns16550_calc_divisor(NS16550_t port, int clock, int baudrate) +{ #ifdef CONFIG_OMAP1510 /* If can't cleanly clock 115200 set div to 1 */ if ((clock == 12000000) && (baudrate == 115200)) { @@ -119,7 +136,7 @@ int ns16550_calc_divisor(NS16550_t port, int clock, int baudrate) port->osc_12m_sel = 0; /* clear if previsouly set */ #endif - return DIV_ROUND_CLOSEST(clock, mode_x_div * baudrate); + return calc_divisor(port, clock, baudrate); } static void NS16550_setbrg(NS16550_t com_port, int baud_divisor) @@ -219,6 +236,47 @@ int NS16550_tstc(NS16550_t com_port) #endif /* CONFIG_NS16550_MIN_FUNCTIONS */ +#ifdef CONFIG_DEBUG_UART_NS16550 + +#include <debug_uart.h> + +void debug_uart_init(void) +{ + struct NS16550 *com_port = (struct NS16550 *)CONFIG_DEBUG_UART_BASE; + int baud_divisor; + + /* + * We copy the code from above because it is already horribly messy. + * Trying to refactor to nicely remove the duplication doesn't seem + * feasible. The better fix is to move all users of this driver to + * driver model. + */ + baud_divisor = calc_divisor(com_port, CONFIG_DEBUG_UART_CLOCK, + CONFIG_BAUDRATE); + + serial_out_shift(&com_port->ier, 0, CONFIG_SYS_NS16550_IER); + serial_out_shift(&com_port->mcr, 0, UART_MCRVAL); + serial_out_shift(&com_port->fcr, 0, UART_FCRVAL); + + serial_out_shift(&com_port->lcr, 0, UART_LCR_BKSE | UART_LCRVAL); + serial_out_shift(&com_port->dll, 0, baud_divisor & 0xff); + serial_out_shift(&com_port->dlm, 0, (baud_divisor >> 8) & 0xff); + serial_out_shift(&com_port->lcr, 0, UART_LCRVAL); +} + +static inline void _debug_uart_putc(int ch) +{ + struct NS16550 *com_port = (struct NS16550 *)CONFIG_DEBUG_UART_BASE; + + while (!(serial_in_shift(&com_port->lsr, 0) & UART_LSR_THRE)) + ; + serial_out_shift(&com_port->thr, 0, ch); +} + +DEBUG_UART_FUNCS + +#endif + #ifdef CONFIG_DM_SERIAL static int ns16550_serial_putc(struct udevice *dev, const char ch) { diff --git a/drivers/serial/serial-uclass.c b/drivers/serial/serial-uclass.c index 9131a8f..3fc7104 100644 --- a/drivers/serial/serial-uclass.c +++ b/drivers/serial/serial-uclass.c @@ -258,6 +258,22 @@ static int serial_post_probe(struct udevice *dev) #endif int ret; +#if defined(CONFIG_NEEDS_MANUAL_RELOC) + if (ops->setbrg) + ops->setbrg += gd->reloc_off; + if (ops->getc) + ops->getc += gd->reloc_off; + if (ops->putc) + ops->putc += gd->reloc_off; + if (ops->pending) + ops->pending += gd->reloc_off; + if (ops->clear) + ops->clear += gd->reloc_off; +#if CONFIG_POST & CONFIG_SYS_POST_UART + if (ops->loop) + ops->loop += gd->reloc_off +#endif +#endif /* Set the baud rate */ if (ops->setbrg) { ret = ops->setbrg(dev, gd->baudrate); diff --git a/drivers/serial/serial.c b/drivers/serial/serial.c index 95c992a..9f78492 100644 --- a/drivers/serial/serial.c +++ b/drivers/serial/serial.c @@ -127,7 +127,6 @@ serial_initfunc(evb64260_serial_initialize); serial_initfunc(imx_serial_initialize); serial_initfunc(iop480_serial_initialize); serial_initfunc(jz_serial_initialize); -serial_initfunc(ks8695_serial_initialize); serial_initfunc(leon2_serial_initialize); serial_initfunc(leon3_serial_initialize); serial_initfunc(lh7a40x_serial_initialize); @@ -220,7 +219,6 @@ void serial_initialize(void) imx_serial_initialize(); iop480_serial_initialize(); jz_serial_initialize(); - ks8695_serial_initialize(); leon2_serial_initialize(); leon3_serial_initialize(); lh7a40x_serial_initialize(); diff --git a/drivers/serial/serial_ks8695.c b/drivers/serial/serial_ks8695.c deleted file mode 100644 index 13adabd..0000000 --- a/drivers/serial/serial_ks8695.c +++ /dev/null @@ -1,121 +0,0 @@ -/* - * serial.c -- KS8695 serial driver - * - * (C) Copyright 2004, Greg Ungerer <greg.ungerer@opengear.com> - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <asm/arch/platform.h> -#include <serial.h> -#include <linux/compiler.h> - -#ifndef CONFIG_SERIAL1 -#error "Bad: you didn't configure serial ..." -#endif - -DECLARE_GLOBAL_DATA_PTR; - -/* - * Define the UART hardware register access structure. - */ -struct ks8695uart { - unsigned int RX; /* 0x00 - Receive data (r) */ - unsigned int TX; /* 0x04 - Transmit data (w) */ - unsigned int FCR; /* 0x08 - Fifo Control (r/w) */ - unsigned int LCR; /* 0x0c - Line Control (r/w) */ - unsigned int MCR; /* 0x10 - Modem Control (r/w) */ - unsigned int LSR; /* 0x14 - Line Status (r/w) */ - unsigned int MSR; /* 0x18 - Modem Status (r/w) */ - unsigned int BD; /* 0x1c - Baud Rate (r/w) */ - unsigned int SR; /* 0x20 - Status (r/w) */ -}; - -#define KS8695_UART_ADDR ((void *) (KS8695_IO_BASE + KS8695_UART_RX_BUFFER)) -#define KS8695_UART_CLK 25000000 - - -/* - * Under some circumstances we want to be "quiet" and not issue any - * serial output - though we want u-boot to otherwise work and behave - * the same. By default be noisy. - */ -int serial_console = 1; - - -static void ks8695_serial_setbrg(void) -{ - volatile struct ks8695uart *uartp = KS8695_UART_ADDR; - - /* Set to global baud rate and 8 data bits, no parity, 1 stop bit*/ - uartp->BD = KS8695_UART_CLK / gd->baudrate; - uartp->LCR = KS8695_UART_LINEC_WLEN8; -} - -static int ks8695_serial_init(void) -{ - serial_console = 1; - serial_setbrg(); - return 0; -} - -static void ks8695_serial_raw_putc(const char c) -{ - volatile struct ks8695uart *uartp = KS8695_UART_ADDR; - int i; - - for (i = 0; (i < 0x100000); i++) { - if (uartp->LSR & KS8695_UART_LINES_TXFE) - break; - } - - uartp->TX = c; -} - -static void ks8695_serial_putc(const char c) -{ - if (serial_console) { - ks8695_serial_raw_putc(c); - if (c == '\n') - ks8695_serial_raw_putc('\r'); - } -} - -static int ks8695_serial_tstc(void) -{ - volatile struct ks8695uart *uartp = KS8695_UART_ADDR; - if (serial_console) - return ((uartp->LSR & KS8695_UART_LINES_RXFE) ? 1 : 0); - return 0; -} - -static int ks8695_serial_getc(void) -{ - volatile struct ks8695uart *uartp = KS8695_UART_ADDR; - - while ((uartp->LSR & KS8695_UART_LINES_RXFE) == 0) - ; - return (uartp->RX); -} - -static struct serial_device ks8695_serial_drv = { - .name = "ks8695_serial", - .start = ks8695_serial_init, - .stop = NULL, - .setbrg = ks8695_serial_setbrg, - .putc = ks8695_serial_putc, - .puts = default_serial_puts, - .getc = ks8695_serial_getc, - .tstc = ks8695_serial_tstc, -}; - -void ks8695_serial_initialize(void) -{ - serial_register(&ks8695_serial_drv); -} - -__weak struct serial_device *default_serial_console(void) -{ - return &ks8695_serial_drv; -} diff --git a/drivers/serial/serial_ppc.c b/drivers/serial/serial_ppc.c new file mode 100644 index 0000000..47141c6 --- /dev/null +++ b/drivers/serial/serial_ppc.c @@ -0,0 +1,40 @@ +/* + * Copyright (c) 2014 Google, Inc + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <dm.h> +#include <ns16550.h> +#include <serial.h> + +static const struct udevice_id ppc_serial_ids[] = { + { .compatible = "ns16550" }, + { } +}; + +static int ppc_serial_ofdata_to_platdata(struct udevice *dev) +{ + struct ns16550_platdata *plat = dev_get_platdata(dev); + int ret; + + ret = ns16550_serial_ofdata_to_platdata(dev); + if (ret) + return ret; + plat->clock = get_serial_clock(); + + return 0; +} + +U_BOOT_DRIVER(serial_ns16550) = { + .name = "serial_ppc", + .id = UCLASS_SERIAL, + .of_match = ppc_serial_ids, + .ofdata_to_platdata = ppc_serial_ofdata_to_platdata, + .platdata_auto_alloc_size = sizeof(struct ns16550_platdata), + .priv_auto_alloc_size = sizeof(struct NS16550), + .probe = ns16550_serial_probe, + .ops = &ns16550_serial_ops, + .flags = DM_FLAG_PRE_RELOC, +}; diff --git a/drivers/serial/serial_sh.c b/drivers/serial/serial_sh.c index 7c1f271..3641c9f 100644 --- a/drivers/serial/serial_sh.c +++ b/drivers/serial/serial_sh.c @@ -1,78 +1,21 @@ /* * SuperH SCIF device driver. * Copyright (C) 2013 Renesas Electronics Corporation - * Copyright (C) 2007,2008,2010 Nobuhiro Iwamatsu + * Copyright (C) 2007,2008,2010, 2014 Nobuhiro Iwamatsu * Copyright (C) 2002 - 2008 Paul Mundt * * SPDX-License-Identifier: GPL-2.0+ */ #include <common.h> +#include <errno.h> +#include <dm.h> #include <asm/io.h> #include <asm/processor.h> -#include "serial_sh.h" #include <serial.h> #include <linux/compiler.h> - -#if defined(CONFIG_CONS_SCIF0) -# define SCIF_BASE SCIF0_BASE -#elif defined(CONFIG_CONS_SCIF1) -# define SCIF_BASE SCIF1_BASE -#elif defined(CONFIG_CONS_SCIF2) -# define SCIF_BASE SCIF2_BASE -#elif defined(CONFIG_CONS_SCIF3) -# define SCIF_BASE SCIF3_BASE -#elif defined(CONFIG_CONS_SCIF4) -# define SCIF_BASE SCIF4_BASE -#elif defined(CONFIG_CONS_SCIF5) -# define SCIF_BASE SCIF5_BASE -#elif defined(CONFIG_CONS_SCIF6) -# define SCIF_BASE SCIF6_BASE -#elif defined(CONFIG_CONS_SCIF7) -# define SCIF_BASE SCIF7_BASE -#else -# error "Default SCIF doesn't set....." -#endif - -#if defined(CONFIG_SCIF_A) - #define SCIF_BASE_PORT PORT_SCIFA -#else - #define SCIF_BASE_PORT PORT_SCIF -#endif - -static struct uart_port sh_sci = { - .membase = (unsigned char*)SCIF_BASE, - .mapbase = SCIF_BASE, - .type = SCIF_BASE_PORT, -}; - -static void sh_serial_setbrg(void) -{ - DECLARE_GLOBAL_DATA_PTR; -#ifdef CONFIG_SCIF_USE_EXT_CLK - unsigned short dl = DL_VALUE(gd->baudrate, CONFIG_SH_SCIF_CLK_FREQ); - sci_out(&sh_sci, DL, dl); - /* Need wait: Clock * 1/dl × 1/16 */ - udelay((1000000 * dl * 16 / CONFIG_SYS_CLK_FREQ) * 1000 + 1); -#else - sci_out(&sh_sci, SCBRR, - SCBRR_VALUE(gd->baudrate, CONFIG_SH_SCIF_CLK_FREQ)); -#endif -} - -static int sh_serial_init(void) -{ - sci_out(&sh_sci, SCSCR , SCSCR_INIT(&sh_sci)); - sci_out(&sh_sci, SCSCR , SCSCR_INIT(&sh_sci)); - sci_out(&sh_sci, SCSMR, 0); - sci_out(&sh_sci, SCSMR, 0); - sci_out(&sh_sci, SCFCR, SCFCR_RFRST|SCFCR_TFRST); - sci_in(&sh_sci, SCFCR); - sci_out(&sh_sci, SCFCR, 0); - - serial_setbrg(); - return 0; -} +#include <dm/platform_data/serial_sh.h> +#include "serial_sh.h" #if defined(CONFIG_CPU_SH7760) || \ defined(CONFIG_CPU_SH7780) || \ @@ -86,7 +29,7 @@ static int scif_rxfill(struct uart_port *port) static int scif_rxfill(struct uart_port *port) { if ((port->mapbase == 0xffe00000) || - (port->mapbase == 0xffe08000)) { + (port->mapbase == 0xffe08000)) { /* SCIF0/1*/ return sci_in(port, SCRFDR) & 0xff; } else { @@ -109,80 +52,253 @@ static int scif_rxfill(struct uart_port *port) } #endif -static int serial_rx_fifo_level(void) +static void sh_serial_init_generic(struct uart_port *port) { - return scif_rxfill(&sh_sci); + sci_out(port, SCSCR , SCSCR_INIT(port)); + sci_out(port, SCSCR , SCSCR_INIT(port)); + sci_out(port, SCSMR, 0); + sci_out(port, SCSMR, 0); + sci_out(port, SCFCR, SCFCR_RFRST|SCFCR_TFRST); + sci_in(port, SCFCR); + sci_out(port, SCFCR, 0); } -static void handle_error(void) +static void +sh_serial_setbrg_generic(struct uart_port *port, int clk, int baudrate) { - sci_in(&sh_sci, SCxSR); - sci_out(&sh_sci, SCxSR, SCxSR_ERROR_CLEAR(&sh_sci)); - sci_in(&sh_sci, SCLSR); - sci_out(&sh_sci, SCLSR, 0x00); + if (port->clk_mode == EXT_CLK) { + unsigned short dl = DL_VALUE(baudrate, clk); + sci_out(port, DL, dl); + /* Need wait: Clock * 1/dl × 1/16 */ + udelay((1000000 * dl * 16 / clk) * 1000 + 1); + } else { + sci_out(port, SCBRR, SCBRR_VALUE(baudrate, clk)); + } } -static void serial_raw_putc(const char c) +static void handle_error(struct uart_port *port) { - while (1) { - /* Tx fifo is empty */ - if (sci_in(&sh_sci, SCxSR) & SCxSR_TEND(&sh_sci)) - break; - } + sci_in(port, SCxSR); + sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port)); + sci_in(port, SCLSR); + sci_out(port, SCLSR, 0x00); +} + +static int serial_raw_putc(struct uart_port *port, const char c) +{ + /* Tx fifo is empty */ + if (!(sci_in(port, SCxSR) & SCxSR_TEND(port))) + return -EAGAIN; - sci_out(&sh_sci, SCxTDR, c); - sci_out(&sh_sci, SCxSR, sci_in(&sh_sci, SCxSR) & ~SCxSR_TEND(&sh_sci)); + sci_out(port, SCxTDR, c); + sci_out(port, SCxSR, sci_in(port, SCxSR) & ~SCxSR_TEND(port)); + + return 0; } -static void sh_serial_putc(const char c) +static int serial_rx_fifo_level(struct uart_port *port) { - if (c == '\n') - serial_raw_putc('\r'); - serial_raw_putc(c); + return scif_rxfill(port); } -static int sh_serial_tstc(void) +static int sh_serial_tstc_generic(struct uart_port *port) { - if (sci_in(&sh_sci, SCxSR) & SCIF_ERRORS) { - handle_error(); + if (sci_in(port, SCxSR) & SCIF_ERRORS) { + handle_error(port); return 0; } - return serial_rx_fifo_level() ? 1 : 0; + return serial_rx_fifo_level(port) ? 1 : 0; } - -static int serial_getc_check(void) +static int serial_getc_check(struct uart_port *port) { unsigned short status; - status = sci_in(&sh_sci, SCxSR); + status = sci_in(port, SCxSR); if (status & SCIF_ERRORS) - handle_error(); - if (sci_in(&sh_sci, SCLSR) & SCxSR_ORER(&sh_sci)) - handle_error(); - return status & (SCIF_DR | SCxSR_RDxF(&sh_sci)); + handle_error(port); + if (sci_in(port, SCLSR) & SCxSR_ORER(port)) + handle_error(port); + return status & (SCIF_DR | SCxSR_RDxF(port)); } -static int sh_serial_getc(void) +static int sh_serial_getc_generic(struct uart_port *port) { unsigned short status; char ch; - while (!serial_getc_check()) - ; + if (!serial_getc_check(port)) + return -EAGAIN; - ch = sci_in(&sh_sci, SCxRDR); - status = sci_in(&sh_sci, SCxSR); + ch = sci_in(port, SCxRDR); + status = sci_in(port, SCxSR); - sci_out(&sh_sci, SCxSR, SCxSR_RDxF_CLEAR(&sh_sci)); + sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); if (status & SCIF_ERRORS) - handle_error(); + handle_error(port); + + if (sci_in(port, SCLSR) & SCxSR_ORER(port)) + handle_error(port); + + return ch; +} + +#ifdef CONFIG_DM_SERIAL + +static int sh_serial_pending(struct udevice *dev, bool input) +{ + struct uart_port *priv = dev_get_priv(dev); + + return sh_serial_tstc_generic(priv); +} + +static int sh_serial_putc(struct udevice *dev, const char ch) +{ + struct uart_port *priv = dev_get_priv(dev); + + return serial_raw_putc(priv, ch); +} + +static int sh_serial_getc(struct udevice *dev) +{ + struct uart_port *priv = dev_get_priv(dev); + + return sh_serial_getc_generic(priv); +} + +static int sh_serial_setbrg(struct udevice *dev, int baudrate) +{ + struct sh_serial_platdata *plat = dev_get_platdata(dev); + struct uart_port *priv = dev_get_priv(dev); + + sh_serial_setbrg_generic(priv, plat->clk, baudrate); + + return 0; +} + +static int sh_serial_probe(struct udevice *dev) +{ + struct sh_serial_platdata *plat = dev_get_platdata(dev); + struct uart_port *priv = dev_get_priv(dev); + + priv->membase = (unsigned char *)plat->base; + priv->mapbase = plat->base; + priv->type = plat->type; + priv->clk_mode = plat->clk_mode; + + sh_serial_init_generic(priv); + + return 0; +} + +static const struct dm_serial_ops sh_serial_ops = { + .putc = sh_serial_putc, + .pending = sh_serial_pending, + .getc = sh_serial_getc, + .setbrg = sh_serial_setbrg, +}; + +U_BOOT_DRIVER(serial_sh) = { + .name = "serial_sh", + .id = UCLASS_SERIAL, + .probe = sh_serial_probe, + .ops = &sh_serial_ops, + .flags = DM_FLAG_PRE_RELOC, + .priv_auto_alloc_size = sizeof(struct uart_port), +}; + +#else /* CONFIG_DM_SERIAL */ + +#if defined(CONFIG_CONS_SCIF0) +# define SCIF_BASE SCIF0_BASE +#elif defined(CONFIG_CONS_SCIF1) +# define SCIF_BASE SCIF1_BASE +#elif defined(CONFIG_CONS_SCIF2) +# define SCIF_BASE SCIF2_BASE +#elif defined(CONFIG_CONS_SCIF3) +# define SCIF_BASE SCIF3_BASE +#elif defined(CONFIG_CONS_SCIF4) +# define SCIF_BASE SCIF4_BASE +#elif defined(CONFIG_CONS_SCIF5) +# define SCIF_BASE SCIF5_BASE +#elif defined(CONFIG_CONS_SCIF6) +# define SCIF_BASE SCIF6_BASE +#elif defined(CONFIG_CONS_SCIF7) +# define SCIF_BASE SCIF7_BASE +#else +# error "Default SCIF doesn't set....." +#endif + +#if defined(CONFIG_SCIF_A) + #define SCIF_BASE_PORT PORT_SCIFA +#else + #define SCIF_BASE_PORT PORT_SCIF +#endif + +static struct uart_port sh_sci = { + .membase = (unsigned char *)SCIF_BASE, + .mapbase = SCIF_BASE, + .type = SCIF_BASE_PORT, +#ifdef CONFIG_SCIF_USE_EXT_CLK + .clk_mode = EXT_CLK, +#endif +}; + +static void sh_serial_setbrg(void) +{ + DECLARE_GLOBAL_DATA_PTR; + struct uart_port *port = &sh_sci; + + sh_serial_setbrg_generic(port, CONFIG_SH_SCIF_CLK_FREQ, gd->baudrate); +} + +static int sh_serial_init(void) +{ + struct uart_port *port = &sh_sci; + + sh_serial_init_generic(port); + serial_setbrg(); + + return 0; +} + +static void sh_serial_putc(const char c) +{ + struct uart_port *port = &sh_sci; + + if (c == '\n') { + while (1) { + if (serial_raw_putc(port, '\r') != -EAGAIN) + break; + } + } + while (1) { + if (serial_raw_putc(port, c) != -EAGAIN) + break; + } +} + +static int sh_serial_tstc(void) +{ + struct uart_port *port = &sh_sci; + + return sh_serial_tstc_generic(port); +} + +static int sh_serial_getc(void) +{ + struct uart_port *port = &sh_sci; + int ch; + + while (1) { + ch = sh_serial_getc_generic(port); + if (ch != -EAGAIN) + break; + } - if (sci_in(&sh_sci, SCLSR) & SCxSR_ORER(&sh_sci)) - handle_error(); return ch; } @@ -206,3 +322,4 @@ __weak struct serial_device *default_serial_console(void) { return &sh_serial_drv; } +#endif /* CONFIG_DM_SERIAL */ diff --git a/drivers/serial/serial_sh.h b/drivers/serial/serial_sh.h index ef88c8f..528aa73 100644 --- a/drivers/serial/serial_sh.h +++ b/drivers/serial/serial_sh.h @@ -2,18 +2,16 @@ * Copy and modify from linux/drivers/serial/sh-sci.h */ +#include <dm/platform_data/serial_sh.h> + struct uart_port { unsigned long iobase; /* in/out[bwl] */ unsigned char *membase; /* read/write[bwl] */ unsigned long mapbase; /* for ioremap */ - unsigned int type; /* port type */ + enum sh_serial_type type; /* port type */ + enum sh_clk_mode clk_mode; /* clock mode */ }; -#define PORT_SCI 52 -#define PORT_SCIF 53 -#define PORT_SCIFA 83 -#define PORT_SCIFB 93 - #if defined(CONFIG_H83007) || defined(CONFIG_H83068) #include <asm/regs306x.h> #endif @@ -526,6 +524,7 @@ SCIF_FNS(SCFDR, 0x1c, 16) SCIF_FNS(SCxTDR, 0x20, 8) SCIF_FNS(SCxRDR, 0x24, 8) SCIF_FNS(SCLSR, 0x00, 0) +SCIF_FNS(DL, 0x00, 0) /* dummy */ #elif defined(CONFIG_ARCH_SH7372) || \ defined(CONFIG_R8A7740) SCIF_FNS(SCSMR, 0x00, 16) @@ -541,6 +540,7 @@ SCIF_FNS(SCRFDR, 0x3c, 16) SCIx_FNS(SCxTDR, 0x20, 8, 0x40, 8) SCIx_FNS(SCxRDR, 0x24, 8, 0x60, 8) SCIF_FNS(SCLSR, 0x00, 0) +SCIF_FNS(DL, 0x00, 0) /* dummy */ #elif defined(CONFIG_CPU_SH7723) ||\ defined(CONFIG_CPU_SH7724) SCIx_FNS(SCSMR, 0x00, 16, 0x00, 16) @@ -555,6 +555,7 @@ SCIF_FNS(SCFER, 0x10, 16) SCIF_FNS(SCFCR, 0x18, 16) SCIF_FNS(SCFDR, 0x1c, 16) SCIF_FNS(SCLSR, 0x24, 16) +SCIF_FNS(DL, 0x00, 0) /* dummy */ #else /* reg SCI/SH3 SCI/SH4 SCIF/SH3 SCIF/SH4 SCI/H8*/ /* name off sz off sz off sz off sz off sz*/ @@ -583,18 +584,21 @@ SCIF_FNS(SCRFDR, 0x0e, 16, 0x20, 16) SCIF_FNS(SCSPTR, 0, 0, 0x24, 16) SCIF_FNS(SCLSR, 0, 0, 0x28, 16) #else + SCIF_FNS(SCFDR, 0x0e, 16, 0x1C, 16) #if defined(CONFIG_CPU_SH7722) SCIF_FNS(SCSPTR, 0, 0, 0, 0) #else SCIF_FNS(SCSPTR, 0, 0, 0x20, 16) #endif +SCIF_FNS(SCLSR, 0, 0, 0x24, 16) +#endif #if defined(CONFIG_R8A7790) || defined(CONFIG_R8A7791) || \ defined(CONFIG_R8A7793) || defined(CONFIG_R8A7794) SCIF_FNS(DL, 0, 0, 0x30, 16) SCIF_FNS(CKS, 0, 0, 0x34, 16) -#endif -SCIF_FNS(SCLSR, 0, 0, 0x24, 16) +#else +SCIF_FNS(DL, 0, 0, 0x0, 0) /* dummy */ #endif #endif #define sci_in(port, reg) sci_##reg##_in(port) @@ -725,14 +729,14 @@ static inline int sci_rxd_in(struct uart_port *port) #define SCBRR_VALUE(bps, clk) (((clk*2)+16*bps)/(32*bps)-1) #elif defined(CONFIG_CPU_SH7723) ||\ defined(CONFIG_CPU_SH7724) -static inline int scbrr_calc(struct uart_port port, int bps, int clk) +static inline int scbrr_calc(struct uart_port *port, int bps, int clk) { - if (port.type == PORT_SCIF) + if (port->type == PORT_SCIF) return (clk+16*bps)/(32*bps)-1; else return ((clk*2)+16*bps)/(16*bps)-1; } -#define SCBRR_VALUE(bps, clk) scbrr_calc(sh_sci, bps, clk) +#define SCBRR_VALUE(bps, clk) scbrr_calc(port, bps, clk) #elif defined(__H8300H__) || defined(__H8300S__) #define SCBRR_VALUE(bps, clk) (((clk*1000/32)/bps)-1) #elif defined(CONFIG_R8A7790) || defined(CONFIG_R8A7791) || \ @@ -742,3 +746,7 @@ static inline int scbrr_calc(struct uart_port port, int bps, int clk) #else /* Generic SH */ #define SCBRR_VALUE(bps, clk) ((clk+16*bps)/(32*bps)-1) #endif + +#ifndef DL_VALUE +#define DL_VALUE(bps, clk) 0 +#endif |