root / hw / bt-hci-csr.c @ 86f3dba6
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/*
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* Bluetooth serial HCI transport.
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* CSR41814 HCI with H4p vendor extensions.
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*
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* Copyright (C) 2008 Andrzej Zaborowski <balrog@zabor.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 or
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* (at your option) version 3 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu-common.h" |
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#include "qemu-char.h" |
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#include "qemu-timer.h" |
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#include "irq.h" |
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#include "sysemu.h" |
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#include "net.h" |
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#include "bt.h" |
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struct csrhci_s {
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int enable;
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qemu_irq *pins; |
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int pin_state;
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int modem_state;
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CharDriverState chr; |
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#define FIFO_LEN 4096 |
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int out_start;
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int out_len;
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int out_size;
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uint8_t outfifo[FIFO_LEN * 2];
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uint8_t inpkt[FIFO_LEN]; |
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int in_len;
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int in_hdr;
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int in_data;
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QEMUTimer *out_tm; |
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int64_t baud_delay; |
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bdaddr_t bd_addr; |
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struct HCIInfo *hci;
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}; |
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/* H4+ packet types */
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enum {
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H4_CMD_PKT = 1,
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H4_ACL_PKT = 2,
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H4_SCO_PKT = 3,
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H4_EVT_PKT = 4,
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H4_NEG_PKT = 6,
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H4_ALIVE_PKT = 7,
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}; |
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/* CSR41814 negotiation start magic packet */
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static const uint8_t csrhci_neg_packet[] = { |
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H4_NEG_PKT, 10,
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0x00, 0xa0, 0x01, 0x00, 0x00, |
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0x4c, 0x00, 0x96, 0x00, 0x00, |
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}; |
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/* CSR41814 vendor-specific command OCFs */
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enum {
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OCF_CSR_SEND_FIRMWARE = 0x000,
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}; |
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static inline void csrhci_fifo_wake(struct csrhci_s *s) |
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{ |
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if (!s->enable || !s->out_len)
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return;
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/* XXX: Should wait for s->modem_state & CHR_TIOCM_RTS? */
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if (s->chr.chr_can_read && s->chr.chr_can_read(s->chr.handler_opaque) &&
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s->chr.chr_read) { |
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s->chr.chr_read(s->chr.handler_opaque, |
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s->outfifo + s->out_start ++, 1);
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s->out_len --; |
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if (s->out_start >= s->out_size) {
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s->out_start = 0;
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s->out_size = FIFO_LEN; |
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} |
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} |
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if (s->out_len)
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qemu_mod_timer(s->out_tm, qemu_get_clock(vm_clock) + s->baud_delay); |
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} |
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#define csrhci_out_packetz(s, len) memset(csrhci_out_packet(s, len), 0, len) |
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static uint8_t *csrhci_out_packet(struct csrhci_s *s, int len) |
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{ |
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int off = s->out_start + s->out_len;
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/* TODO: do the padding here, i.e. align len */
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s->out_len += len; |
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if (off < FIFO_LEN) {
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if (off + len > FIFO_LEN && (s->out_size = off + len) > FIFO_LEN * 2) { |
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fprintf(stderr, "%s: can't alloc %i bytes\n", __FUNCTION__, len);
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exit(-1);
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} |
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return s->outfifo + off;
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} |
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if (s->out_len > s->out_size) {
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fprintf(stderr, "%s: can't alloc %i bytes\n", __FUNCTION__, len);
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exit(-1);
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} |
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return s->outfifo + off - s->out_size;
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} |
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static inline uint8_t *csrhci_out_packet_csr(struct csrhci_s *s, |
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int type, int len) |
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{ |
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uint8_t *ret = csrhci_out_packetz(s, len + 2);
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*ret ++ = type; |
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*ret ++ = len; |
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return ret;
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} |
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static inline uint8_t *csrhci_out_packet_event(struct csrhci_s *s, |
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int evt, int len) |
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{ |
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uint8_t *ret = csrhci_out_packetz(s, |
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len + 1 + sizeof(struct hci_event_hdr)); |
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*ret ++ = H4_EVT_PKT; |
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((struct hci_event_hdr *) ret)->evt = evt;
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((struct hci_event_hdr *) ret)->plen = len;
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return ret + sizeof(struct hci_event_hdr); |
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} |
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static void csrhci_in_packet_vendor(struct csrhci_s *s, int ocf, |
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uint8_t *data, int len)
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{ |
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int offset;
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uint8_t *rpkt; |
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switch (ocf) {
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case OCF_CSR_SEND_FIRMWARE:
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/* Check if this is the bd_address packet */
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if (len >= 18 + 8 && data[12] == 0x01 && data[13] == 0x00) { |
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offset = 18;
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s->bd_addr.b[0] = data[offset + 7]; /* Beyond cmd packet end(!?) */ |
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s->bd_addr.b[1] = data[offset + 6]; |
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s->bd_addr.b[2] = data[offset + 4]; |
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s->bd_addr.b[3] = data[offset + 0]; |
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s->bd_addr.b[4] = data[offset + 3]; |
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s->bd_addr.b[5] = data[offset + 2]; |
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s->hci->bdaddr_set(s->hci, s->bd_addr.b); |
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fprintf(stderr, "%s: bd_address loaded from firmware: "
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"%02x:%02x:%02x:%02x:%02x:%02x\n", __FUNCTION__,
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s->bd_addr.b[0], s->bd_addr.b[1], s->bd_addr.b[2], |
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s->bd_addr.b[3], s->bd_addr.b[4], s->bd_addr.b[5]); |
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} |
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rpkt = csrhci_out_packet_event(s, EVT_VENDOR, 11);
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/* Status bytes: no error */
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rpkt[9] = 0x00; |
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rpkt[10] = 0x00; |
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break;
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default:
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fprintf(stderr, "%s: got a bad CMD packet\n", __FUNCTION__);
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return;
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} |
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csrhci_fifo_wake(s); |
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} |
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static void csrhci_in_packet(struct csrhci_s *s, uint8_t *pkt) |
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{ |
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uint8_t *rpkt; |
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int opc;
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switch (*pkt ++) {
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case H4_CMD_PKT:
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opc = le16_to_cpu(((struct hci_command_hdr *) pkt)->opcode);
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if (cmd_opcode_ogf(opc) == OGF_VENDOR_CMD) {
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csrhci_in_packet_vendor(s, cmd_opcode_ocf(opc), |
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pkt + sizeof(struct hci_command_hdr), |
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s->in_len - sizeof(struct hci_command_hdr) - 1); |
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return;
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} |
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/* TODO: if the command is OCF_READ_LOCAL_COMMANDS or the likes,
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* we need to send it to the HCI layer and then add our supported
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* commands to the returned mask (such as OGF_VENDOR_CMD). With
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* bt-hci.c we could just have hooks for this kind of commands but
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* we can't with bt-host.c. */
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s->hci->cmd_send(s->hci, pkt, s->in_len - 1);
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break;
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case H4_EVT_PKT:
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goto bad_pkt;
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case H4_ACL_PKT:
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s->hci->acl_send(s->hci, pkt, s->in_len - 1);
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break;
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case H4_SCO_PKT:
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s->hci->sco_send(s->hci, pkt, s->in_len - 1);
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break;
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case H4_NEG_PKT:
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if (s->in_hdr != sizeof(csrhci_neg_packet) || |
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memcmp(pkt - 1, csrhci_neg_packet, s->in_hdr)) {
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fprintf(stderr, "%s: got a bad NEG packet\n", __FUNCTION__);
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return;
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} |
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pkt += 2;
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rpkt = csrhci_out_packet_csr(s, H4_NEG_PKT, 10);
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*rpkt ++ = 0x20; /* Operational settings negotation Ok */ |
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memcpy(rpkt, pkt, 7); rpkt += 7; |
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*rpkt ++ = 0xff;
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*rpkt ++ = 0xff;
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break;
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case H4_ALIVE_PKT:
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if (s->in_hdr != 4 || pkt[1] != 0x55 || pkt[2] != 0x00) { |
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fprintf(stderr, "%s: got a bad ALIVE packet\n", __FUNCTION__);
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return;
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} |
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rpkt = csrhci_out_packet_csr(s, H4_ALIVE_PKT, 2);
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*rpkt ++ = 0xcc;
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*rpkt ++ = 0x00;
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break;
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default:
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bad_pkt:
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/* TODO: error out */
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fprintf(stderr, "%s: got a bad packet\n", __FUNCTION__);
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break;
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} |
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csrhci_fifo_wake(s); |
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} |
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static int csrhci_header_len(const uint8_t *pkt) |
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{ |
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switch (pkt[0]) { |
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case H4_CMD_PKT:
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return HCI_COMMAND_HDR_SIZE;
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case H4_EVT_PKT:
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return HCI_EVENT_HDR_SIZE;
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case H4_ACL_PKT:
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return HCI_ACL_HDR_SIZE;
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case H4_SCO_PKT:
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return HCI_SCO_HDR_SIZE;
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case H4_NEG_PKT:
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return pkt[1] + 1; |
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case H4_ALIVE_PKT:
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return 3; |
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} |
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exit(-1);
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} |
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static int csrhci_data_len(const uint8_t *pkt) |
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{ |
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switch (*pkt ++) {
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case H4_CMD_PKT:
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/* It seems that vendor-specific command packets for H4+ are all
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* one byte longer than indicated in the standard header. */
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if (le16_to_cpu(((struct hci_command_hdr *) pkt)->opcode) == 0xfc00) |
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return (((struct hci_command_hdr *) pkt)->plen + 1) & ~1; |
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return ((struct hci_command_hdr *) pkt)->plen; |
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case H4_EVT_PKT:
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return ((struct hci_event_hdr *) pkt)->plen; |
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case H4_ACL_PKT:
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return le16_to_cpu(((struct hci_acl_hdr *) pkt)->dlen); |
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case H4_SCO_PKT:
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return ((struct hci_sco_hdr *) pkt)->dlen; |
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case H4_NEG_PKT:
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case H4_ALIVE_PKT:
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return 0; |
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} |
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exit(-1);
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} |
297 |
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static int csrhci_write(struct CharDriverState *chr, |
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const uint8_t *buf, int len) |
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{ |
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struct csrhci_s *s = (struct csrhci_s *) chr->opaque; |
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int plen = s->in_len;
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if (!s->enable)
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return 0; |
306 |
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s->in_len += len; |
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memcpy(s->inpkt + plen, buf, len); |
309 |
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while (1) { |
311 |
if (s->in_len >= 2 && plen < 2) |
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s->in_hdr = csrhci_header_len(s->inpkt) + 1;
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if (s->in_len >= s->in_hdr && plen < s->in_hdr)
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s->in_data = csrhci_data_len(s->inpkt) + s->in_hdr; |
316 |
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if (s->in_len >= s->in_data) {
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csrhci_in_packet(s, s->inpkt); |
319 |
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memmove(s->inpkt, s->inpkt + s->in_len, s->in_len - s->in_data); |
321 |
s->in_len -= s->in_data; |
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s->in_hdr = INT_MAX; |
323 |
s->in_data = INT_MAX; |
324 |
plen = 0;
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} else
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break;
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327 |
} |
328 |
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return len;
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} |
331 |
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static void csrhci_out_hci_packet_event(void *opaque, |
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const uint8_t *data, int len) |
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{ |
335 |
struct csrhci_s *s = (struct csrhci_s *) opaque; |
336 |
uint8_t *pkt = csrhci_out_packet(s, (len + 2) & ~1); /* Align */ |
337 |
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338 |
*pkt ++ = H4_EVT_PKT; |
339 |
memcpy(pkt, data, len); |
340 |
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csrhci_fifo_wake(s); |
342 |
} |
343 |
|
344 |
static void csrhci_out_hci_packet_acl(void *opaque, |
345 |
const uint8_t *data, int len) |
346 |
{ |
347 |
struct csrhci_s *s = (struct csrhci_s *) opaque; |
348 |
uint8_t *pkt = csrhci_out_packet(s, (len + 2) & ~1); /* Align */ |
349 |
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*pkt ++ = H4_ACL_PKT; |
351 |
pkt[len & ~1] = 0; |
352 |
memcpy(pkt, data, len); |
353 |
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csrhci_fifo_wake(s); |
355 |
} |
356 |
|
357 |
static int csrhci_ioctl(struct CharDriverState *chr, int cmd, void *arg) |
358 |
{ |
359 |
QEMUSerialSetParams *ssp; |
360 |
struct csrhci_s *s = (struct csrhci_s *) chr->opaque; |
361 |
int prev_state = s->modem_state;
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362 |
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363 |
switch (cmd) {
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364 |
case CHR_IOCTL_SERIAL_SET_PARAMS:
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365 |
ssp = (QEMUSerialSetParams *) arg; |
366 |
s->baud_delay = get_ticks_per_sec() / ssp->speed; |
367 |
/* Moments later... (but shorter than 100ms) */
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368 |
s->modem_state |= CHR_TIOCM_CTS; |
369 |
break;
|
370 |
|
371 |
case CHR_IOCTL_SERIAL_GET_TIOCM:
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372 |
*(int *) arg = s->modem_state;
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373 |
break;
|
374 |
|
375 |
case CHR_IOCTL_SERIAL_SET_TIOCM:
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376 |
s->modem_state = *(int *) arg;
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377 |
if (~s->modem_state & prev_state & CHR_TIOCM_RTS)
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378 |
s->modem_state &= ~CHR_TIOCM_CTS; |
379 |
break;
|
380 |
|
381 |
default:
|
382 |
return -ENOTSUP;
|
383 |
} |
384 |
return 0; |
385 |
} |
386 |
|
387 |
static void csrhci_reset(struct csrhci_s *s) |
388 |
{ |
389 |
s->out_len = 0;
|
390 |
s->out_size = FIFO_LEN; |
391 |
s->in_len = 0;
|
392 |
s->baud_delay = get_ticks_per_sec(); |
393 |
s->enable = 0;
|
394 |
s->in_hdr = INT_MAX; |
395 |
s->in_data = INT_MAX; |
396 |
|
397 |
s->modem_state = 0;
|
398 |
/* After a while... (but sooner than 10ms) */
|
399 |
s->modem_state |= CHR_TIOCM_CTS; |
400 |
|
401 |
memset(&s->bd_addr, 0, sizeof(bdaddr_t)); |
402 |
} |
403 |
|
404 |
static void csrhci_out_tick(void *opaque) |
405 |
{ |
406 |
csrhci_fifo_wake((struct csrhci_s *) opaque);
|
407 |
} |
408 |
|
409 |
static void csrhci_pins(void *opaque, int line, int level) |
410 |
{ |
411 |
struct csrhci_s *s = (struct csrhci_s *) opaque; |
412 |
int state = s->pin_state;
|
413 |
|
414 |
s->pin_state &= ~(1 << line);
|
415 |
s->pin_state |= (!!level) << line; |
416 |
|
417 |
if ((state & ~s->pin_state) & (1 << csrhci_pin_reset)) { |
418 |
/* TODO: Disappear from lower layers */
|
419 |
csrhci_reset(s); |
420 |
} |
421 |
|
422 |
if (s->pin_state == 3 && state != 3) { |
423 |
s->enable = 1;
|
424 |
/* TODO: Wake lower layers up */
|
425 |
} |
426 |
} |
427 |
|
428 |
qemu_irq *csrhci_pins_get(CharDriverState *chr) |
429 |
{ |
430 |
struct csrhci_s *s = (struct csrhci_s *) chr->opaque; |
431 |
|
432 |
return s->pins;
|
433 |
} |
434 |
|
435 |
CharDriverState *uart_hci_init(qemu_irq wakeup) |
436 |
{ |
437 |
struct csrhci_s *s = (struct csrhci_s *) |
438 |
qemu_mallocz(sizeof(struct csrhci_s)); |
439 |
|
440 |
s->chr.opaque = s; |
441 |
s->chr.chr_write = csrhci_write; |
442 |
s->chr.chr_ioctl = csrhci_ioctl; |
443 |
|
444 |
s->hci = qemu_next_hci(); |
445 |
s->hci->opaque = s; |
446 |
s->hci->evt_recv = csrhci_out_hci_packet_event; |
447 |
s->hci->acl_recv = csrhci_out_hci_packet_acl; |
448 |
|
449 |
s->out_tm = qemu_new_timer(vm_clock, csrhci_out_tick, s); |
450 |
s->pins = qemu_allocate_irqs(csrhci_pins, s, __csrhci_pins); |
451 |
csrhci_reset(s); |
452 |
|
453 |
return &s->chr;
|
454 |
} |