diff options
Diffstat (limited to 'hw/pm_smbus.c')
| -rw-r--r-- | hw/pm_smbus.c | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/hw/pm_smbus.c b/hw/pm_smbus.c deleted file mode 100644 index 790061065c..0000000000 --- a/hw/pm_smbus.c +++ /dev/null @@ -1,185 +0,0 @@ -/* - * PC SMBus implementation - * splitted from acpi.c - * - * Copyright (c) 2006 Fabrice Bellard - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License version 2 as published by the Free Software Foundation. - * - * This library 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 - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see - * <http://www.gnu.org/licenses/>. - */ -#include "hw/hw.h" -#include "hw/pc.h" -#include "hw/pm_smbus.h" -#include "hw/smbus.h" - -/* no save/load? */ - -#define SMBHSTSTS 0x00 -#define SMBHSTCNT 0x02 -#define SMBHSTCMD 0x03 -#define SMBHSTADD 0x04 -#define SMBHSTDAT0 0x05 -#define SMBHSTDAT1 0x06 -#define SMBBLKDAT 0x07 - -//#define DEBUG - -#ifdef DEBUG -# define SMBUS_DPRINTF(format, ...) printf(format, ## __VA_ARGS__) -#else -# define SMBUS_DPRINTF(format, ...) do { } while (0) -#endif - - -static void smb_transaction(PMSMBus *s) -{ - uint8_t prot = (s->smb_ctl >> 2) & 0x07; - uint8_t read = s->smb_addr & 0x01; - uint8_t cmd = s->smb_cmd; - uint8_t addr = s->smb_addr >> 1; - i2c_bus *bus = s->smbus; - - SMBUS_DPRINTF("SMBus trans addr=0x%02x prot=0x%02x\n", addr, prot); - switch(prot) { - case 0x0: - smbus_quick_command(bus, addr, read); - break; - case 0x1: - if (read) { - s->smb_data0 = smbus_receive_byte(bus, addr); - } else { - smbus_send_byte(bus, addr, cmd); - } - break; - case 0x2: - if (read) { - s->smb_data0 = smbus_read_byte(bus, addr, cmd); - } else { - smbus_write_byte(bus, addr, cmd, s->smb_data0); - } - break; - case 0x3: - if (read) { - uint16_t val; - val = smbus_read_word(bus, addr, cmd); - s->smb_data0 = val; - s->smb_data1 = val >> 8; - } else { - smbus_write_word(bus, addr, cmd, (s->smb_data1 << 8) | s->smb_data0); - } - break; - case 0x5: - if (read) { - s->smb_data0 = smbus_read_block(bus, addr, cmd, s->smb_data); - } else { - smbus_write_block(bus, addr, cmd, s->smb_data, s->smb_data0); - } - break; - default: - goto error; - } - return; - - error: - s->smb_stat |= 0x04; -} - -static void smb_ioport_writeb(void *opaque, hwaddr addr, uint64_t val, - unsigned width) -{ - PMSMBus *s = opaque; - - SMBUS_DPRINTF("SMB writeb port=0x%04x val=0x%02x\n", addr, val); - switch(addr) { - case SMBHSTSTS: - s->smb_stat = 0; - s->smb_index = 0; - break; - case SMBHSTCNT: - s->smb_ctl = val; - if (val & 0x40) - smb_transaction(s); - break; - case SMBHSTCMD: - s->smb_cmd = val; - break; - case SMBHSTADD: - s->smb_addr = val; - break; - case SMBHSTDAT0: - s->smb_data0 = val; - break; - case SMBHSTDAT1: - s->smb_data1 = val; - break; - case SMBBLKDAT: - s->smb_data[s->smb_index++] = val; - if (s->smb_index > 31) - s->smb_index = 0; - break; - default: - break; - } -} - -static uint64_t smb_ioport_readb(void *opaque, hwaddr addr, unsigned width) -{ - PMSMBus *s = opaque; - uint32_t val; - - switch(addr) { - case SMBHSTSTS: - val = s->smb_stat; - break; - case SMBHSTCNT: - s->smb_index = 0; - val = s->smb_ctl & 0x1f; - break; - case SMBHSTCMD: - val = s->smb_cmd; - break; - case SMBHSTADD: - val = s->smb_addr; - break; - case SMBHSTDAT0: - val = s->smb_data0; - break; - case SMBHSTDAT1: - val = s->smb_data1; - break; - case SMBBLKDAT: - val = s->smb_data[s->smb_index++]; - if (s->smb_index > 31) - s->smb_index = 0; - break; - default: - val = 0; - break; - } - SMBUS_DPRINTF("SMB readb port=0x%04x val=0x%02x\n", addr, val); - return val; -} - -static const MemoryRegionOps pm_smbus_ops = { - .read = smb_ioport_readb, - .write = smb_ioport_writeb, - .valid.min_access_size = 1, - .valid.max_access_size = 1, - .endianness = DEVICE_LITTLE_ENDIAN, -}; - -void pm_smbus_init(DeviceState *parent, PMSMBus *smb) -{ - smb->smbus = i2c_init_bus(parent, "i2c"); - memory_region_init_io(&smb->io, &pm_smbus_ops, smb, "pm-smbus", 64); -} |