2 * TI OMAP processors UART emulation.
5 * Copyright (C) 2007-2009 Nokia Corporation
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 or
10 * (at your option) version 3 of the License.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, see <http://www.gnu.org/licenses/>.
20 #include "qemu-char.h"
23 /* We use pc-style serial ports. */
25 #include "exec-memory.h"
29 target_phys_addr_t base;
30 SerialState *serial; /* TODO */
31 struct omap_target_agent_s *ta;
44 void omap_uart_reset(struct omap_uart_s *s)
53 struct omap_uart_s *omap_uart_init(target_phys_addr_t base,
54 qemu_irq irq, omap_clk fclk, omap_clk iclk,
55 qemu_irq txdma, qemu_irq rxdma,
56 const char *label, CharDriverState *chr)
58 struct omap_uart_s *s = (struct omap_uart_s *)
59 g_malloc0(sizeof(struct omap_uart_s));
64 s->serial = serial_mm_init(get_system_memory(), base, 2, irq,
65 omap_clk_getrate(fclk)/16,
66 chr ?: qemu_chr_new(label, "null", NULL),
67 DEVICE_NATIVE_ENDIAN);
71 static uint32_t omap_uart_read(void *opaque, target_phys_addr_t addr)
73 struct omap_uart_s *s = (struct omap_uart_s *) opaque;
85 case 0x48: /* EBLR (OMAP2) */
87 case 0x4C: /* OSC_12M_SEL (OMAP1) */
91 case 0x54: /* SYSC (OMAP2) */
93 case 0x58: /* SYSS (OMAP2) */
95 case 0x5c: /* WER (OMAP2) */
97 case 0x60: /* CFPS (OMAP2) */
105 static void omap_uart_write(void *opaque, target_phys_addr_t addr,
108 struct omap_uart_s *s = (struct omap_uart_s *) opaque;
112 case 0x20: /* MDR1 */
113 s->mdr[0] = value & 0x7f;
115 case 0x24: /* MDR2 */
116 s->mdr[1] = value & 0xff;
119 s->scr = value & 0xff;
121 case 0x48: /* EBLR (OMAP2) */
122 s->eblr = value & 0xff;
124 case 0x4C: /* OSC_12M_SEL (OMAP1) */
125 s->clksel = value & 1;
129 case 0x58: /* SYSS (OMAP2) */
132 case 0x54: /* SYSC (OMAP2) */
133 s->syscontrol = value & 0x1d;
137 case 0x5c: /* WER (OMAP2) */
138 s->wkup = value & 0x7f;
140 case 0x60: /* CFPS (OMAP2) */
141 s->cfps = value & 0xff;
148 static CPUReadMemoryFunc * const omap_uart_readfn[] = {
154 static CPUWriteMemoryFunc * const omap_uart_writefn[] = {
157 omap_badwidth_write8,
160 struct omap_uart_s *omap2_uart_init(struct omap_target_agent_s *ta,
161 qemu_irq irq, omap_clk fclk, omap_clk iclk,
162 qemu_irq txdma, qemu_irq rxdma,
163 const char *label, CharDriverState *chr)
165 target_phys_addr_t base = omap_l4_attach(ta, 0, 0);
166 struct omap_uart_s *s = omap_uart_init(base, irq,
167 fclk, iclk, txdma, rxdma, label, chr);
168 int iomemtype = cpu_register_io_memory(omap_uart_readfn,
169 omap_uart_writefn, s, DEVICE_NATIVE_ENDIAN);
173 cpu_register_physical_memory(base + 0x20, 0x100, iomemtype);
178 void omap_uart_attach(struct omap_uart_s *s, CharDriverState *chr)
180 /* TODO: Should reuse or destroy current s->serial */
181 s->serial = serial_mm_init(get_system_memory(), s->base, 2, s->irq,
182 omap_clk_getrate(s->fclk) / 16,
183 chr ?: qemu_chr_new("null", "null", NULL),
184 DEVICE_NATIVE_ENDIAN);