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- /*
- * TI OMAP processors UART emulation.
- *
- * Copyright (C) 2006-2008 Andrzej Zaborowski <balrog@zabor.org>
- * Copyright (C) 2007-2009 Nokia Corporation
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 or
- * (at your option) version 3 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, see <http://www.gnu.org/licenses/>.
- */
- #include "qemu-char.h"
- #include "hw.h"
- #include "omap.h"
- /* We use pc-style serial ports. */
- #include "pc.h"
- /* UARTs */
- struct omap_uart_s {
- target_phys_addr_t base;
- SerialState *serial; /* TODO */
- struct omap_target_agent_s *ta;
- omap_clk fclk;
- qemu_irq irq;
- uint8_t eblr;
- uint8_t syscontrol;
- uint8_t wkup;
- uint8_t cfps;
- uint8_t mdr[2];
- uint8_t scr;
- uint8_t clksel;
- };
- void omap_uart_reset(struct omap_uart_s *s)
- {
- s->eblr = 0x00;
- s->syscontrol = 0;
- s->wkup = 0x3f;
- s->cfps = 0x69;
- s->clksel = 0;
- }
- struct omap_uart_s *omap_uart_init(target_phys_addr_t base,
- qemu_irq irq, omap_clk fclk, omap_clk iclk,
- qemu_irq txdma, qemu_irq rxdma,
- const char *label, CharDriverState *chr)
- {
- struct omap_uart_s *s = (struct omap_uart_s *)
- qemu_mallocz(sizeof(struct omap_uart_s));
- s->base = base;
- s->fclk = fclk;
- s->irq = irq;
- #ifdef TARGET_WORDS_BIGENDIAN
- s->serial = serial_mm_init(base, 2, irq, omap_clk_getrate(fclk)/16,
- chr ?: qemu_chr_open(label, "null", NULL), 1,
- 1);
- #else
- s->serial = serial_mm_init(base, 2, irq, omap_clk_getrate(fclk)/16,
- chr ?: qemu_chr_open(label, "null", NULL), 1,
- 0);
- #endif
- return s;
- }
- static uint32_t omap_uart_read(void *opaque, target_phys_addr_t addr)
- {
- struct omap_uart_s *s = (struct omap_uart_s *) opaque;
- addr &= 0xff;
- switch (addr) {
- case 0x20: /* MDR1 */
- return s->mdr[0];
- case 0x24: /* MDR2 */
- return s->mdr[1];
- case 0x40: /* SCR */
- return s->scr;
- case 0x44: /* SSR */
- return 0x0;
- case 0x48: /* EBLR (OMAP2) */
- return s->eblr;
- case 0x4C: /* OSC_12M_SEL (OMAP1) */
- return s->clksel;
- case 0x50: /* MVR */
- return 0x30;
- case 0x54: /* SYSC (OMAP2) */
- return s->syscontrol;
- case 0x58: /* SYSS (OMAP2) */
- return 1;
- case 0x5c: /* WER (OMAP2) */
- return s->wkup;
- case 0x60: /* CFPS (OMAP2) */
- return s->cfps;
- }
- OMAP_BAD_REG(addr);
- return 0;
- }
- static void omap_uart_write(void *opaque, target_phys_addr_t addr,
- uint32_t value)
- {
- struct omap_uart_s *s = (struct omap_uart_s *) opaque;
- addr &= 0xff;
- switch (addr) {
- case 0x20: /* MDR1 */
- s->mdr[0] = value & 0x7f;
- break;
- case 0x24: /* MDR2 */
- s->mdr[1] = value & 0xff;
- break;
- case 0x40: /* SCR */
- s->scr = value & 0xff;
- break;
- case 0x48: /* EBLR (OMAP2) */
- s->eblr = value & 0xff;
- break;
- case 0x4C: /* OSC_12M_SEL (OMAP1) */
- s->clksel = value & 1;
- break;
- case 0x44: /* SSR */
- case 0x50: /* MVR */
- case 0x58: /* SYSS (OMAP2) */
- OMAP_RO_REG(addr);
- break;
- case 0x54: /* SYSC (OMAP2) */
- s->syscontrol = value & 0x1d;
- if (value & 2)
- omap_uart_reset(s);
- break;
- case 0x5c: /* WER (OMAP2) */
- s->wkup = value & 0x7f;
- break;
- case 0x60: /* CFPS (OMAP2) */
- s->cfps = value & 0xff;
- break;
- default:
- OMAP_BAD_REG(addr);
- }
- }
- static CPUReadMemoryFunc * const omap_uart_readfn[] = {
- omap_uart_read,
- omap_uart_read,
- omap_badwidth_read8,
- };
- static CPUWriteMemoryFunc * const omap_uart_writefn[] = {
- omap_uart_write,
- omap_uart_write,
- omap_badwidth_write8,
- };
- struct omap_uart_s *omap2_uart_init(struct omap_target_agent_s *ta,
- qemu_irq irq, omap_clk fclk, omap_clk iclk,
- qemu_irq txdma, qemu_irq rxdma,
- const char *label, CharDriverState *chr)
- {
- target_phys_addr_t base = omap_l4_attach(ta, 0, 0);
- struct omap_uart_s *s = omap_uart_init(base, irq,
- fclk, iclk, txdma, rxdma, label, chr);
- int iomemtype = cpu_register_io_memory(omap_uart_readfn,
- omap_uart_writefn, s, DEVICE_NATIVE_ENDIAN);
- s->ta = ta;
- cpu_register_physical_memory(base + 0x20, 0x100, iomemtype);
- return s;
- }
- void omap_uart_attach(struct omap_uart_s *s, CharDriverState *chr)
- {
- /* TODO: Should reuse or destroy current s->serial */
- #ifdef TARGET_WORDS_BIGENDIAN
- s->serial = serial_mm_init(s->base, 2, s->irq,
- omap_clk_getrate(s->fclk) / 16,
- chr ?: qemu_chr_open("null", "null", NULL), 1,
- 1);
- #else
- s->serial = serial_mm_init(s->base, 2, s->irq,
- omap_clk_getrate(s->fclk) / 16,
- chr ?: qemu_chr_open("null", "null", NULL), 1,
- 0);
- #endif
- }
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