Index: kernel/genarch/Makefile.inc =================================================================== --- kernel/genarch/Makefile.inc (revision b2fa1204c76e1eaec329888181d281aac04ed61e) +++ kernel/genarch/Makefile.inc (revision 6a3d0c7d3c6877f7abc3f9784c37e626fd07986f) @@ -90,7 +90,7 @@ endif -ifeq ($(CONFIG_ARM926_UART),y) +ifeq ($(CONFIG_PL011_UART),y) GENARCH_SOURCES += \ - genarch/src/drivers/arm926_uart/arm926_uart.c + genarch/src/drivers/pl011/pl011.c endif @@ -123,4 +123,9 @@ GENARCH_SOURCES += \ genarch/src/drivers/am335x/timer.c +endif + +ifeq ($(CONFIG_BCM2835_MAILBOX),y) + GENARCH_SOURCES += \ + genarch/src/drivers/bcm2835/mbox.c endif Index: kernel/genarch/include/genarch/drivers/arm926_uart/arm926_uart.h =================================================================== --- kernel/genarch/include/genarch/drivers/arm926_uart/arm926_uart.h (revision b2fa1204c76e1eaec329888181d281aac04ed61e) +++ (revision ) @@ -1,169 +1,0 @@ -/* - * Copyright (c) 2012 Jan Vesely - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * - Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -/** @addtogroup genarch - * @{ - */ -/** - * @file - * @brief ARM926 on-chip UART (PrimeCell UART, PL011) driver. - */ - -#ifndef KERN_ARM926_UART_H_ -#define KERN_ARM926_UART_H_ - -#include -#include -#include - - -/** ARM926 User Guide ch. 4.8.5 (p. 106 in the pdf) */ -#define ARM926_UART0_BASE_ADDRESS 0x16000000 -#define ARM926_UART1_BASE_ADDRESS 0x16000000 - -/** ARM926 User Guide ch. A.1 (p. 124 in the pdf) */ -#define ARM926_UART0_IRQ 1 -#define ARM926_UART1_IRQ 2 - -/** PrimeCell UART TRM ch. 3.3 (p. 49 in the pdf) */ -typedef struct { - /** UART data register */ - ioport32_t data; -#define ARM926_UART_DATA_DATA_MASK 0xff -#define ARM926_UART_DATA_FE_FLAG (1 << 7) -#define ARM926_UART_DATA_PE_FLAG (1 << 9) -#define ARM926_UART_DATA_BE_FLAG (1 << 10) -#define ARM926_UART_DATA_OE_FLAG (1 << 11) - - union { - /* Same values that are in upper bits of data register*/ - const ioport32_t status; -#define ARM926_UART_STATUS_FE_FLAG (1 << 0) -#define ARM926_UART_STATUS_PE_FLAG (1 << 1) -#define ARM926_UART_STATUS_BE_FLAG (1 << 2) -#define ARM926_UART_STATUS_OE_FLAG (1 << 3) - /* Writing anything clears all errors */ - ioport32_t error_clear; - }; - uint32_t padd0_[4]; - - const ioport32_t flag; -#define ARM926_UART_FLAG_CTS_FLAG (1 << 0) -#define ARM926_UART_FLAG_DSR_FLAG (1 << 1) -#define ARM926_UART_FLAG_DCD_FLAG (1 << 2) -#define ARM926_UART_FLAG_BUSY_FLAG (1 << 3) -#define ARM926_UART_FLAG_RXFE_FLAG (1 << 4) -#define ARM926_UART_FLAG_TXFF_FLAG (1 << 5) -#define ARM926_UART_FLAG_RXFF_FLAG (1 << 6) -#define ARM926_UART_FLAG_TXFE_FLAG (1 << 7) -#define ARM926_UART_FLAG_RI_FLAG (1 << 8) - uint32_t padd1_; - - ioport32_t irda_low_power; -#define ARM926_UART_IRDA_LOW_POWER_MASK 0xff - - ioport32_t int_baud_divisor; -#define ARM926_UART_INT_BAUD_DIVISOR_MASK 0xffff - - ioport32_t fract_baud_divisor; -#define ARM926_UART_FRACT_BAUD_DIVISOR_MASK 0x1f - - ioport32_t line_control_high; -#define ARM926_UART_CONTROLHI_BRK_FLAG (1 << 0) -#define ARM926_UART_CONTROLHI_PEN_FLAG (1 << 1) -#define ARM926_UART_CONTROLHI_EPS_FLAG (1 << 2) -#define ARM926_UART_CONTROLHI_STP2_FLAG (1 << 3) -#define ARM926_UART_CONTROLHI_FEN_FLAG (1 << 4) -#define ARM926_UART_CONTROLHI_WLEN_MASK 0x3 -#define ARM926_UART_CONTROLHI_WLEN_SHIFT 5 -#define ARM926_UART_CONTROLHI_SPS_FLAG (1 << 5) - - ioport32_t control; -#define ARM926_UART_CONTROL_UARTEN_FLAG (1 << 0) -#define ARM926_UART_CONTROL_SIREN_FLAG (1 << 1) -#define ARM926_UART_CONTROL_SIRLP_FLAG (1 << 2) -#define ARM926_UART_CONTROL_LBE_FLAG (1 << 7) -#define ARM926_UART_CONTROL_TXE_FLAG (1 << 8) -#define ARM926_UART_CONTROL_RXE_FLAG (1 << 9) -#define ARM926_UART_CONTROL_DTR_FLAG (1 << 10) -#define ARM926_UART_CONTROL_RTS_FLAG (1 << 11) -#define ARM926_UART_CONTROL_OUT1_FLAG (1 << 12) -#define ARM926_UART_CONTROL_OUT2_FLAG (1 << 13) -#define ARM926_UART_CONTROL_RTSE_FLAG (1 << 14) -#define ARM926_UART_CONTROL_CTSE_FLAG (1 << 15) - - ioport32_t interrupt_fifo; -#define ARM926_UART_INTERRUPTFIFO_TX_MASK 0x7 -#define ARM926_UART_INTERRUPTFIFO_TX_SHIFT 0 -#define ARM926_UART_INTERRUPTFIFO_RX_MASK 0x7 -#define ARM926_UART_INTERRUPTFIFO_RX_SHIFT 3 - - /** Interrupt mask register */ - ioport32_t interrupt_mask; - /** Pending interrupts before applying the mask */ - const ioport32_t raw_interrupt_status; - /** Pending interrupts after applying the mask */ - const ioport32_t masked_interrupt_status; - /** Write 1s to clear pending interrupts */ - ioport32_t interrupt_clear; -#define ARM926_UART_INTERRUPT_RIM_FLAG (1 << 0) -#define ARM926_UART_INTERRUPT_CTSM_FLAG (1 << 1) -#define ARM926_UART_INTERRUPT_DCDM_FLAG (1 << 2) -#define ARM926_UART_INTERRUPT_DSRM_FLAG (1 << 3) -#define ARM926_UART_INTERRUPT_RX_FLAG (1 << 4) -#define ARM926_UART_INTERRUPT_TX_FLAG (1 << 5) -#define ARM926_UART_INTERRUPT_RT_FLAG (1 << 6) -#define ARM926_UART_INTERRUPT_FE_FLAG (1 << 7) -#define ARM926_UART_INTERRUPT_PE_FLAG (1 << 8) -#define ARM926_UART_INTERRUPT_BE_FLAG (1 << 9) -#define ARM926_UART_INTERRUPT_OE_FLAG (1 << 10) -#define ARM926_UART_INTERRUPT_ALL 0x3ff - - ioport32_t dma_control; -#define ARM926_UART_DMACONTROL_RXDMAEN_FLAG (1 << 0) -#define ARM926_UART_DMACONTROL_TXDMAEN_FLAG (1 << 1) -#define ARM926_UART_DMACONTROL_DMAONERR_FLAG (1 << 2) - - // TODO There is some reserved space here followed by - // peripheral identification registers. -} arm926_uart_regs_t; - -typedef struct { - arm926_uart_regs_t *regs; - indev_t *indev; - outdev_t outdev; - irq_t irq; -} arm926_uart_t; - -bool arm926_uart_init(arm926_uart_t *, inr_t, uintptr_t, size_t); -void arm926_uart_input_wire(arm926_uart_t *, indev_t *); - -#endif -/** - * @} - */ Index: kernel/genarch/include/genarch/drivers/bcm2835/irc.h =================================================================== --- kernel/genarch/include/genarch/drivers/bcm2835/irc.h (revision 6a3d0c7d3c6877f7abc3f9784c37e626fd07986f) +++ kernel/genarch/include/genarch/drivers/bcm2835/irc.h (revision 6a3d0c7d3c6877f7abc3f9784c37e626fd07986f) @@ -0,0 +1,174 @@ +/* + * Copyright (c) 2012 Jan Vesely + * Copyright (c) 2013 Beniamino Galvani + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * - The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +/** @addtogroup genarch + * @{ + */ +/** + * @file + * @brief Broadcom BCM2835 on-chip interrupt controller driver. + */ + +#ifndef KERN_BCM2835_IRQC_H_ +#define KERN_BCM2835_IRQC_H_ + +#include + +#define BANK_GPU0 0 +#define BANK_GPU1 1 +#define BANK_ARM 2 + +#define IRQ_TO_BANK(x) ((x) >> 5) +#define IRQ_TO_NUM(x) ((x) & 0x1f) + +#define MAKE_IRQ(b,n) (((b) << 5) | ((n) & 0x1f)) + +#define BCM2835_UART_IRQ MAKE_IRQ(BANK_GPU1, 25) +#define BCM2835_TIMER1_IRQ MAKE_IRQ(BANK_GPU0, 1) + +#define IRQ_PEND_ARM_M 0xFF +#define IRQ_PEND_GPU0_M (1 << 8) +#define IRQ_PEND_GPU1_M (1 << 9) +#define IRQ_PEND_SHORT_M 0x1FFC00 +#define IRQ_PEND_SHORT_S 10 + +unsigned shortcut_inums[] = {7, 9, 10, 18, 19, 53, 54, 55, 56, 57, 62}; + +typedef struct { + ioport32_t irq_basic_pending; + ioport32_t irq_pending1; + ioport32_t irq_pending2; + + ioport32_t fiq_control; + + ioport32_t irq_enable[3]; + ioport32_t irq_disable[3]; +} bcm2835_irc_t; + +#define BCM2835_IRC_ADDR 0x2000b200 +#define BCM2835_IRQ_COUNT 96 + +static inline void bcm2835_irc_dump(bcm2835_irc_t *regs) +{ +#define DUMP_REG(name) \ + printf("%s : %08x\n", #name, regs->name); + + DUMP_REG(irq_basic_pending); + DUMP_REG(irq_pending1); + DUMP_REG(irq_pending2); + DUMP_REG(fiq_control); + + for (int i = 0; i < 3; ++i) { + DUMP_REG(irq_enable[i]); + DUMP_REG(irq_disable[i]); + } +#undef DUMP_REG +} + +static inline void bcm2835_irc_init(bcm2835_irc_t *regs) +{ + /* Disable all interrupts */ + regs->irq_disable[BANK_GPU0] = 0xffffffff; + regs->irq_disable[BANK_GPU1] = 0xffffffff; + regs->irq_disable[BANK_ARM] = 0xffffffff; + + /* Disable FIQ generation */ + regs->fiq_control = 0; +} + +static inline int ffs(unsigned int x) +{ + int ret; + + asm volatile ( + "clz r0, %[x]\n" + "rsb %[ret], r0, #32\n" + : [ret] "=r" (ret) + : [x] "r" (x) + : "r0" ); + + return ret; +} + +static inline unsigned bcm2835_irc_inum_get(bcm2835_irc_t *regs) +{ + uint32_t pending; + int inum = -1; + + pending = regs->irq_basic_pending; + + /* + * The basic pending register shows interrupts pending from ARM + * peripherals and it also contains, in order to speed up processing, + * additional information about pending GPU interrupts: + * + * - bits 0-7 are associated to ARM peripherals + * - bit 8 is 1 when at least one bit is set in pending register 1 + * - bit 9 is 1 when at least one bit is set in pending register 2 + * - bits 10-20 indicate pending status of selected GPU peripherals + * + * Reference: BCM2835 ARM Peripherals, p.113 + */ + + if (pending & IRQ_PEND_ARM_M) { + inum = MAKE_IRQ(BANK_ARM, ffs(pending & IRQ_PEND_ARM_M) - 1); + } else if (pending & IRQ_PEND_SHORT_M) { + int pos = (pending & IRQ_PEND_SHORT_M) >> IRQ_PEND_SHORT_S; + inum = shortcut_inums[ffs(pos) - 1]; + } else if (pending & IRQ_PEND_GPU0_M) { + inum = MAKE_IRQ(BANK_GPU0, ffs(regs->irq_pending1) - 1); + } else if (pending & IRQ_PEND_GPU1_M) { + inum = MAKE_IRQ(BANK_GPU1, ffs(regs->irq_pending2) - 1); + } + + if (inum < 0) { + printf("Spurious interrupt!\n"); + bcm2835_irc_dump(regs); + inum = 0; + } + + return inum; +} + +static inline void bcm2835_irc_enable(bcm2835_irc_t *regs, unsigned inum) +{ + ASSERT(inum < BCM2835_IRQ_COUNT); + regs->irq_enable[IRQ_TO_BANK(inum)] |= (1 << IRQ_TO_NUM(inum)); +} + +static inline void bcm2835_irc_disable(bcm2835_irc_t *regs, unsigned inum) +{ + ASSERT(inum < BCM2835_IRQ_COUNT); + regs->irq_disable[IRQ_TO_BANK(inum)] |= (1 << IRQ_TO_NUM(inum)); +} + +#endif /* KERN_BCM2835_IRQC_H_ */ + +/** + * @} + */ Index: kernel/genarch/include/genarch/drivers/bcm2835/mbox.h =================================================================== --- kernel/genarch/include/genarch/drivers/bcm2835/mbox.h (revision 6a3d0c7d3c6877f7abc3f9784c37e626fd07986f) +++ kernel/genarch/include/genarch/drivers/bcm2835/mbox.h (revision 6a3d0c7d3c6877f7abc3f9784c37e626fd07986f) @@ -0,0 +1,142 @@ +/* + * Copyright (c) 2013 Beniamino Galvani + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * - The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +/** @addtogroup genarch + * @{ + */ +/** + * @file + * @brief BCM2835 mailbox communication routines + */ + +#ifndef _BCM2835_MBOX_H_ +#define _BCM2835_MBOX_H_ + +#include +#include +#include + +#define BCM2835_MBOX0_ADDR 0x2000B880 + +enum { + MBOX_CHAN_PM = 0, + MBOX_CHAN_FB = 1, + MBOX_CHAN_UART = 2, + MBOX_CHAN_VCHIQ = 3, + MBOX_CHAN_LED = 4, + MBOX_CHAN_BTN = 5, + MBOX_CHAN_TS = 6, + MBOX_CHAN_PROP_A2V = 8, + MBOX_CHAN_PROP_V2A = 9 +}; + +enum { + TAG_GET_FW_REV = 0x00000001, + TAG_GET_BOARD_MODEL = 0x00010001, + TAG_GET_BOARD_REV = 0x00010002, + TAG_GET_BOARD_MAC = 0x00010003, + TAG_GET_BOARD_SERIAL = 0x00010004, + TAG_GET_ARM_MEMORY = 0x00010005, + TAG_GET_VC_MEMORY = 0x00010006, + TAG_GET_CLOCKS = 0x00010007, + TAG_GET_CMD_LINE = 0x00050001, +}; + +enum { + MBOX_PROP_CODE_REQ = 0x00000000, + MBOX_PROP_CODE_RESP_OK = 0x80000000, + MBOX_PROP_CODE_RESP_ERR = 0x80000001 +}; + +#define MBOX_STATUS_FULL (1 << 31) +#define MBOX_STATUS_EMPTY (1 << 30) + +#define MBOX_COMPOSE(chan, value) (((chan) & 0xf) | ((value) & ~0xf)) +#define MBOX_MSG_CHAN(msg) ((msg) & 0xf) +#define MBOX_MSG_VALUE(msg) ((msg) & ~0xf) + +#define KA2VCA(addr) (KA2PA(addr) + 0x40000000) + +#define MBOX_ADDR_ALIGN 16 + +#define MBOX_BUFF_ALLOC(name, type) \ + char tmp_ ## name[sizeof(type) + MBOX_ADDR_ALIGN] = { 0 }; \ + type *name = (type *)ALIGN_UP((uintptr_t)tmp_ ## name, MBOX_ADDR_ALIGN); + +typedef struct { + ioport32_t read; + ioport32_t unused[3]; + ioport32_t peek; + ioport32_t sender; + ioport32_t status; + ioport32_t config; + ioport32_t write; +} bcm2835_mbox_t; + +typedef struct { + ioport32_t size; + ioport32_t code; +} mbox_prop_buf_hdr_t; + +typedef struct { + ioport32_t tag_id; + ioport32_t buf_size; + ioport32_t val_len; +} mbox_tag_hdr_t; + +typedef struct { + ioport32_t base; + ioport32_t size; +} mbox_tag_getmem_resp_t; + +typedef struct { + mbox_prop_buf_hdr_t buf_hdr; + mbox_tag_hdr_t tag_hdr; + mbox_tag_getmem_resp_t data; + uint32_t zero; +} mbox_getmem_buf_t; + +typedef struct { + ioport32_t width; + ioport32_t height; + ioport32_t virt_width; + ioport32_t virt_height; + ioport32_t pitch; + ioport32_t bpp; + ioport32_t x_offset; + ioport32_t y_offset; + ioport32_t addr; + ioport32_t size; +} bcm2835_fb_desc_t; + +bool bcm2835_prop_get_memory(uint32_t *base, uint32_t *size); +bool bcm2835_fb_init(fb_properties_t *prop); + +#endif +/** + * @} + */ Index: kernel/genarch/include/genarch/drivers/bcm2835/timer.h =================================================================== --- kernel/genarch/include/genarch/drivers/bcm2835/timer.h (revision 6a3d0c7d3c6877f7abc3f9784c37e626fd07986f) +++ kernel/genarch/include/genarch/drivers/bcm2835/timer.h (revision 6a3d0c7d3c6877f7abc3f9784c37e626fd07986f) @@ -0,0 +1,84 @@ +/* + * Copyright (c) 2013 Beniamino Galvani + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * - The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +/** @addtogroup genarch + * @{ + */ +/** + * @file + * @brief Broadcom BCM2835 system timer driver. + */ + +#ifndef KERN_BCM2835_TIMER_H_ + +#include +#include + +#define BCM2835_TIMER_ADDR 0x20003000 +#define BCM2835_CLOCK_FREQ 1000000 + +typedef struct { + /** System Timer Control/Status */ + ioport32_t cs; +#define BCM2835_TIMER_CS_M0 (1 << 0) +#define BCM2835_TIMER_CS_M1 (1 << 1) +#define BCM2835_TIMER_CS_M2 (1 << 2) +#define BCM2835_TIMER_CS_M3 (1 << 3) + /** System Timer Counter Lower 32 bits */ + ioport32_t clo; + /** System Timer Counter Higher 32 bits */ + ioport32_t chi; + /** System Timer Compare 0 */ + ioport32_t c0; + /** System Timer Compare 1 */ + ioport32_t c1; + /** System Timer Compare 2 */ + ioport32_t c2; + /** System Timer Compare 3 */ + ioport32_t c3; +} bcm2835_timer_t; + + +static inline void bcm2835_timer_start(bcm2835_timer_t* timer) +{ + ASSERT(timer); + /* Clear pending interrupt on channel 1 */ + timer->cs |= BCM2835_TIMER_CS_M1; + /* Initialize compare value for match channel 1 */ + timer->c1 = timer->clo + (BCM2835_CLOCK_FREQ / HZ); +} + +static inline void bcm2835_timer_irq_ack(bcm2835_timer_t* timer) +{ + ASSERT(timer); + /* Clear pending interrupt on channel 1 */ + timer->cs |= BCM2835_TIMER_CS_M1; + /* Reprogram compare value for match channel 1 */ + timer->c1 = timer->clo + (BCM2835_CLOCK_FREQ / HZ); +} + +#endif /* KERN_BCM2835_TIMER_H_ */ Index: kernel/genarch/include/genarch/drivers/pl011/pl011.h =================================================================== --- kernel/genarch/include/genarch/drivers/pl011/pl011.h (revision 6a3d0c7d3c6877f7abc3f9784c37e626fd07986f) +++ kernel/genarch/include/genarch/drivers/pl011/pl011.h (revision 6a3d0c7d3c6877f7abc3f9784c37e626fd07986f) @@ -0,0 +1,160 @@ +/* + * Copyright (c) 2012 Jan Vesely + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * - The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/** @addtogroup genarch + * @{ + */ +/** + * @file + * @brief ARM PrimeCell PL011 UART driver. + */ + +#ifndef KERN_PL011_H_ +#define KERN_PL011_H_ + +#include +#include +#include + +/** PrimeCell UART TRM ch. 3.3 (p. 49 in the pdf) */ +typedef struct { + /** UART data register */ + ioport32_t data; +#define PL011_UART_DATA_DATA_MASK 0xff +#define PL011_UART_DATA_FE_FLAG (1 << 7) +#define PL011_UART_DATA_PE_FLAG (1 << 9) +#define PL011_UART_DATA_BE_FLAG (1 << 10) +#define PL011_UART_DATA_OE_FLAG (1 << 11) + + union { + /* Same values that are in upper bits of data register*/ + const ioport32_t status; +#define PL011_UART_STATUS_FE_FLAG (1 << 0) +#define PL011_UART_STATUS_PE_FLAG (1 << 1) +#define PL011_UART_STATUS_BE_FLAG (1 << 2) +#define PL011_UART_STATUS_OE_FLAG (1 << 3) + /* Writing anything clears all errors */ + ioport32_t error_clear; + }; + uint32_t padd0_[4]; + + const ioport32_t flag; +#define PL011_UART_FLAG_CTS_FLAG (1 << 0) +#define PL011_UART_FLAG_DSR_FLAG (1 << 1) +#define PL011_UART_FLAG_DCD_FLAG (1 << 2) +#define PL011_UART_FLAG_BUSY_FLAG (1 << 3) +#define PL011_UART_FLAG_RXFE_FLAG (1 << 4) +#define PL011_UART_FLAG_TXFF_FLAG (1 << 5) +#define PL011_UART_FLAG_RXFF_FLAG (1 << 6) +#define PL011_UART_FLAG_TXFE_FLAG (1 << 7) +#define PL011_UART_FLAG_RI_FLAG (1 << 8) + uint32_t padd1_; + + ioport32_t irda_low_power; +#define PL011_UART_IRDA_LOW_POWER_MASK 0xff + + ioport32_t int_baud_divisor; +#define PL011_UART_INT_BAUD_DIVISOR_MASK 0xffff + + ioport32_t fract_baud_divisor; +#define PL011_UART_FRACT_BAUD_DIVISOR_MASK 0x1f + + ioport32_t line_control_high; +#define PL011_UART_CONTROLHI_BRK_FLAG (1 << 0) +#define PL011_UART_CONTROLHI_PEN_FLAG (1 << 1) +#define PL011_UART_CONTROLHI_EPS_FLAG (1 << 2) +#define PL011_UART_CONTROLHI_STP2_FLAG (1 << 3) +#define PL011_UART_CONTROLHI_FEN_FLAG (1 << 4) +#define PL011_UART_CONTROLHI_WLEN_MASK 0x3 +#define PL011_UART_CONTROLHI_WLEN_SHIFT 5 +#define PL011_UART_CONTROLHI_SPS_FLAG (1 << 5) + + ioport32_t control; +#define PL011_UART_CONTROL_UARTEN_FLAG (1 << 0) +#define PL011_UART_CONTROL_SIREN_FLAG (1 << 1) +#define PL011_UART_CONTROL_SIRLP_FLAG (1 << 2) +#define PL011_UART_CONTROL_LBE_FLAG (1 << 7) +#define PL011_UART_CONTROL_TXE_FLAG (1 << 8) +#define PL011_UART_CONTROL_RXE_FLAG (1 << 9) +#define PL011_UART_CONTROL_DTR_FLAG (1 << 10) +#define PL011_UART_CONTROL_RTS_FLAG (1 << 11) +#define PL011_UART_CONTROL_OUT1_FLAG (1 << 12) +#define PL011_UART_CONTROL_OUT2_FLAG (1 << 13) +#define PL011_UART_CONTROL_RTSE_FLAG (1 << 14) +#define PL011_UART_CONTROL_CTSE_FLAG (1 << 15) + + ioport32_t interrupt_fifo; +#define PL011_UART_INTERRUPTFIFO_TX_MASK 0x7 +#define PL011_UART_INTERRUPTFIFO_TX_SHIFT 0 +#define PL011_UART_INTERRUPTFIFO_RX_MASK 0x7 +#define PL011_UART_INTERRUPTFIFO_RX_SHIFT 3 + + /** Interrupt mask register */ + ioport32_t interrupt_mask; + /** Pending interrupts before applying the mask */ + const ioport32_t raw_interrupt_status; + /** Pending interrupts after applying the mask */ + const ioport32_t masked_interrupt_status; + /** Write 1s to clear pending interrupts */ + ioport32_t interrupt_clear; +#define PL011_UART_INTERRUPT_RIM_FLAG (1 << 0) +#define PL011_UART_INTERRUPT_CTSM_FLAG (1 << 1) +#define PL011_UART_INTERRUPT_DCDM_FLAG (1 << 2) +#define PL011_UART_INTERRUPT_DSRM_FLAG (1 << 3) +#define PL011_UART_INTERRUPT_RX_FLAG (1 << 4) +#define PL011_UART_INTERRUPT_TX_FLAG (1 << 5) +#define PL011_UART_INTERRUPT_RT_FLAG (1 << 6) +#define PL011_UART_INTERRUPT_FE_FLAG (1 << 7) +#define PL011_UART_INTERRUPT_PE_FLAG (1 << 8) +#define PL011_UART_INTERRUPT_BE_FLAG (1 << 9) +#define PL011_UART_INTERRUPT_OE_FLAG (1 << 10) +#define PL011_UART_INTERRUPT_ALL 0x3ff + + ioport32_t dma_control; +#define PL011_UART_DMACONTROL_RXDMAEN_FLAG (1 << 0) +#define PL011_UART_DMACONTROL_TXDMAEN_FLAG (1 << 1) +#define PL011_UART_DMACONTROL_DMAONERR_FLAG (1 << 2) + + // TODO There is some reserved space here followed by + // peripheral identification registers. +} pl011_uart_regs_t; + +typedef struct { + pl011_uart_regs_t *regs; + indev_t *indev; + outdev_t outdev; + irq_t irq; +} pl011_uart_t; + +bool pl011_uart_init(pl011_uart_t *, inr_t, uintptr_t); +void pl011_uart_input_wire(pl011_uart_t *, indev_t *); + +#endif +/** + * @} + */ Index: kernel/genarch/src/drivers/arm926_uart/arm926_uart.c =================================================================== --- kernel/genarch/src/drivers/arm926_uart/arm926_uart.c (revision b2fa1204c76e1eaec329888181d281aac04ed61e) +++ (revision ) @@ -1,140 +1,0 @@ -/* - * Copyright (c) 2012 Jan Vesely - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * - Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -/** @addtogroup genarch - * @{ - */ -/** - * @file - * @brief ARM926 on-chip UART (PrimeCell UART, PL011) driver. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -static void arm926_uart_sendb(arm926_uart_t *uart, uint8_t byte) -{ - /* Wait for space becoming available in Tx FIFO. */ - // TODO make pio_read accept consts pointers and remove the cast - while ((pio_read_32((ioport32_t*)&uart->regs->flag) & ARM926_UART_FLAG_TXFF_FLAG) != 0) - ; - - pio_write_32(&uart->regs->data, byte); -} - -static void arm926_uart_putchar(outdev_t *dev, wchar_t ch) -{ - arm926_uart_t *uart = dev->data; - - if (!ascii_check(ch)) { - arm926_uart_sendb(uart, U_SPECIAL); - } else { - if (ch == '\n') - arm926_uart_sendb(uart, (uint8_t) '\r'); - arm926_uart_sendb(uart, (uint8_t) ch); - } -} - -static outdev_operations_t arm926_uart_ops = { - .write = arm926_uart_putchar, - .redraw = NULL, -}; - -static irq_ownership_t arm926_uart_claim(irq_t *irq) -{ - return IRQ_ACCEPT; -} - -static void arm926_uart_irq_handler(irq_t *irq) -{ - arm926_uart_t *uart = irq->instance; - - // TODO make pio_read accept const pointers and remove the cast - while ((pio_read_32((ioport32_t*)&uart->regs->flag) & ARM926_UART_FLAG_RXFE_FLAG) == 0) { - /* We ignore all error flags here */ - const uint8_t data = pio_read_32(&uart->regs->data); - if (uart->indev) - indev_push_character(uart->indev, data); - } - /* Ack interrupts */ - pio_write_32(&uart->regs->interrupt_clear, ARM926_UART_INTERRUPT_ALL); -} - -bool arm926_uart_init( - arm926_uart_t *uart, inr_t interrupt, uintptr_t addr, size_t size) -{ - ASSERT(uart); - uart->regs = (void*)km_map(addr, size, PAGE_NOT_CACHEABLE); - - ASSERT(uart->regs); - - /* Enable hw flow control */ - uart->regs->control = 0 | - ARM926_UART_CONTROL_UARTEN_FLAG | - ARM926_UART_CONTROL_RTSE_FLAG | - ARM926_UART_CONTROL_CTSE_FLAG; - - /* Mask all interrupts */ - uart->regs->interrupt_mask = 0; - - outdev_initialize("arm926_uart_dev", &uart->outdev, &arm926_uart_ops); - uart->outdev.data = uart; - - /* Initialize IRQ */ - irq_initialize(&uart->irq); - uart->irq.devno = device_assign_devno(); - uart->irq.inr = interrupt; - uart->irq.claim = arm926_uart_claim; - uart->irq.handler = arm926_uart_irq_handler; - uart->irq.instance = uart; - - return true; -} - -void arm926_uart_input_wire(arm926_uart_t *uart, indev_t *indev) -{ - ASSERT(uart); - ASSERT(indev); - - uart->indev = indev; - irq_register(&uart->irq); - /* Enable receive interrupt */ - uart->regs->interrupt_mask |= ARM926_UART_INTERRUPT_RX_FLAG; -} - -/** @} - */ - Index: kernel/genarch/src/drivers/bcm2835/mbox.c =================================================================== --- kernel/genarch/src/drivers/bcm2835/mbox.c (revision 6a3d0c7d3c6877f7abc3f9784c37e626fd07986f) +++ kernel/genarch/src/drivers/bcm2835/mbox.c (revision 6a3d0c7d3c6877f7abc3f9784c37e626fd07986f) @@ -0,0 +1,130 @@ +/* + * Copyright (c) 2013 Beniamino Galvani + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * - The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +/** @addtogroup genarch + * @{ + */ +/** + * @file + * @brief BCM2835 mailbox communication routines + */ + +#include +#include +#include + +static void mbox_write(bcm2835_mbox_t *mbox, uint8_t chan, uint32_t value) +{ + while (mbox->status & MBOX_STATUS_FULL) ; + mbox->write = MBOX_COMPOSE(chan, value); +} + +static uint32_t mbox_read(bcm2835_mbox_t *mbox, uint8_t chan) +{ + uint32_t msg; + + do { + while (mbox->status & MBOX_STATUS_EMPTY) ; + msg = mbox->read; + } while (MBOX_MSG_CHAN(msg) != chan); + + return MBOX_MSG_VALUE(msg); +} + +bool bcm2835_prop_get_memory(uint32_t *base, uint32_t *size) +{ + bool ret; + MBOX_BUFF_ALLOC(req, mbox_getmem_buf_t); + + req->buf_hdr.size = sizeof(mbox_getmem_buf_t); + req->buf_hdr.code = MBOX_PROP_CODE_REQ; + req->tag_hdr.tag_id = TAG_GET_ARM_MEMORY; + req->tag_hdr.buf_size = sizeof(mbox_tag_getmem_resp_t); + req->tag_hdr.val_len = 0; + req->zero = 0; + + mbox_write((bcm2835_mbox_t *)BCM2835_MBOX0_ADDR, + MBOX_CHAN_PROP_A2V, KA2VCA((uint32_t)req)); + mbox_read((bcm2835_mbox_t *)BCM2835_MBOX0_ADDR, + MBOX_CHAN_PROP_A2V); + + if (req->buf_hdr.code == MBOX_PROP_CODE_RESP_OK) { + *base = req->data.base; + *size = req->data.size; + ret = true; + } else { + ret = false; + } + + return ret; +} + +bool bcm2835_fb_init(fb_properties_t *prop) +{ + bcm2835_mbox_t *fb_mbox; + bool ret = false; + MBOX_BUFF_ALLOC(fb_desc, bcm2835_fb_desc_t); + + fb_mbox = (void *) km_map(BCM2835_MBOX0_ADDR, sizeof(bcm2835_mbox_t), + PAGE_NOT_CACHEABLE); + + fb_desc->width = 640; + fb_desc->height = 480; + fb_desc->virt_width = fb_desc->width; + fb_desc->virt_height = fb_desc->height; + fb_desc->pitch = 0; /* Set by VC */ + fb_desc->bpp = 16; + fb_desc->x_offset = 0; + fb_desc->y_offset = 0; + fb_desc->addr = 0; /* Set by VC */ + fb_desc->size = 0; /* Set by VC */ + + mbox_write(fb_mbox, MBOX_CHAN_FB, KA2VCA(fb_desc)); + + if (mbox_read(fb_mbox, MBOX_CHAN_FB)) { + printf("BCM2835 framebuffer initialization failed\n"); + goto out; + } + + prop->addr = fb_desc->addr; + prop->offset = 0; + prop->x = fb_desc->width; + prop->y = fb_desc->height; + prop->scan = fb_desc->pitch; + prop->visual = VISUAL_RGB_5_6_5_LE; + + printf("BCM2835 framebuffer at 0x%08x (%dx%d)\n", prop->addr, + prop->x, prop->y); + ret = true; +out: + km_unmap((uintptr_t)fb_mbox, sizeof(bcm2835_mbox_t)); + return ret; +} + +/** + * @} + */ Index: kernel/genarch/src/drivers/pl011/pl011.c =================================================================== --- kernel/genarch/src/drivers/pl011/pl011.c (revision 6a3d0c7d3c6877f7abc3f9784c37e626fd07986f) +++ kernel/genarch/src/drivers/pl011/pl011.c (revision 6a3d0c7d3c6877f7abc3f9784c37e626fd07986f) @@ -0,0 +1,150 @@ +/* + * Copyright (c) 2012 Jan Vesely + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * - The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/** @addtogroup genarch + * @{ + */ +/** + * @file + * @brief ARM PrimeCell PL011 UART driver. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static void pl011_uart_sendb(pl011_uart_t *uart, uint8_t byte) +{ + /* Wait for space becoming available in Tx FIFO. */ + // TODO make pio_read accept consts pointers and remove the cast + while ((pio_read_32((ioport32_t*)&uart->regs->flag) & PL011_UART_FLAG_TXFF_FLAG) != 0) + ; + + pio_write_32(&uart->regs->data, byte); +} + +static void pl011_uart_putchar(outdev_t *dev, wchar_t ch) +{ + pl011_uart_t *uart = dev->data; + + if (!ascii_check(ch)) { + pl011_uart_sendb(uart, U_SPECIAL); + } else { + if (ch == '\n') + pl011_uart_sendb(uart, (uint8_t) '\r'); + pl011_uart_sendb(uart, (uint8_t) ch); + } +} + +static outdev_operations_t pl011_uart_ops = { + .write = pl011_uart_putchar, + .redraw = NULL, +}; + +static irq_ownership_t pl011_uart_claim(irq_t *irq) +{ + return IRQ_ACCEPT; +} + +static void pl011_uart_irq_handler(irq_t *irq) +{ + pl011_uart_t *uart = irq->instance; + + // TODO make pio_read accept const pointers and remove the cast + while ((pio_read_32((ioport32_t*)&uart->regs->flag) & PL011_UART_FLAG_RXFE_FLAG) == 0) { + /* We ignore all error flags here */ + const uint8_t data = pio_read_32(&uart->regs->data); + if (uart->indev) + indev_push_character(uart->indev, data); + } + /* Ack interrupts */ + pio_write_32(&uart->regs->interrupt_clear, PL011_UART_INTERRUPT_ALL); +} + +bool pl011_uart_init(pl011_uart_t *uart, inr_t interrupt, uintptr_t addr) +{ + ASSERT(uart); + uart->regs = (void*)km_map(addr, sizeof(pl011_uart_regs_t), + PAGE_NOT_CACHEABLE); + ASSERT(uart->regs); + + /* Disable UART */ + uart->regs->control &= ~ PL011_UART_CONTROL_UARTEN_FLAG; + + /* Enable hw flow control */ + uart->regs->control |= + PL011_UART_CONTROL_RTSE_FLAG | + PL011_UART_CONTROL_CTSE_FLAG; + + /* Mask all interrupts */ + uart->regs->interrupt_mask = 0; + /* Clear interrupts */ + uart->regs->interrupt_clear = PL011_UART_INTERRUPT_ALL; + /* Enable UART, TX and RX */ + uart->regs->control |= + PL011_UART_CONTROL_UARTEN_FLAG | + PL011_UART_CONTROL_TXE_FLAG | + PL011_UART_CONTROL_RXE_FLAG; + + outdev_initialize("pl011_uart_dev", &uart->outdev, &pl011_uart_ops); + uart->outdev.data = uart; + + /* Initialize IRQ */ + irq_initialize(&uart->irq); + uart->irq.devno = device_assign_devno(); + uart->irq.inr = interrupt; + uart->irq.claim = pl011_uart_claim; + uart->irq.handler = pl011_uart_irq_handler; + uart->irq.instance = uart; + + return true; +} + +void pl011_uart_input_wire(pl011_uart_t *uart, indev_t *indev) +{ + ASSERT(uart); + ASSERT(indev); + + uart->indev = indev; + irq_register(&uart->irq); + /* Enable receive interrupts */ + uart->regs->interrupt_mask |= + PL011_UART_INTERRUPT_RX_FLAG | + PL011_UART_INTERRUPT_RT_FLAG; +} + +/** @} + */ +