From patchwork Wed Jun 19 22:19:28 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Laurent Vivier X-Patchwork-Id: 1119041 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=vivier.eu Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 45Tfhz1wsBz9s5c for ; Thu, 20 Jun 2019 08:27:45 +1000 (AEST) Received: from localhost ([::1]:42342 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hdj3M-0007Om-1R for incoming@patchwork.ozlabs.org; Wed, 19 Jun 2019 18:27:40 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:36069) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hdiwu-0001lS-Ul for qemu-devel@nongnu.org; Wed, 19 Jun 2019 18:21:02 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hdiwt-0007qL-A8 for qemu-devel@nongnu.org; Wed, 19 Jun 2019 18:21:00 -0400 Received: from mout.kundenserver.de ([212.227.126.187]:48353) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1hdiwp-0007jo-Rh; Wed, 19 Jun 2019 18:20:56 -0400 Received: from localhost.localdomain ([78.238.229.36]) by mrelayeu.kundenserver.de (mreue011 [212.227.15.167]) with ESMTPSA (Nemesis) id 1N6sSV-1igEMN0WAJ-018Nv1; Thu, 20 Jun 2019 00:19:56 +0200 From: Laurent Vivier To: qemu-devel@nongnu.org Date: Thu, 20 Jun 2019 00:19:28 +0200 Message-Id: <20190619221933.1981-6-laurent@vivier.eu> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190619221933.1981-1-laurent@vivier.eu> References: <20190619221933.1981-1-laurent@vivier.eu> MIME-Version: 1.0 X-Provags-ID: V03:K1:BBoTL/ECTKIHx5+KQHuigAZ+malLinV2NbOCLmG7YQVSLP8Onln IFmWfIaF4TX4SGe2M534z8+pCaOswCVXkLNRPyQdoAoXY9nnX1Gr0FxcRI3fY53R9jBPkvC iAF07KjZqkMbWuTSnMKkuCftRrAnv9rM7GYzin3sMz1AyaFtv4gNw65GD4gHNqVP2HKfHrV VK4aMVXWXx1/InnLq1KhA== X-UI-Out-Filterresults: notjunk:1; V03:K0:C+CSz9wy2tw=:zk6lLzlfSZj3H2P4TBo6a3 rzEcXsZqqTNYgop9L7gqgCcUnSjPWkUUyTrcMk8vJkG1A25oNJRp28MJYenXvMYvyYAmnrQpQ WUmOH3jh69FkSaG6kYvMIrA90k/SX7or3/lR2b7qUEVrvU+DLJohIt3HYOzSyprIupsBQqIRr WiCcpBemrss0oLzsMH6hRKzJF8bs2Q+DKyFLlwq0v3XesGFnaIXto8nQw0ih3BuVGZhkLAt14 fLW94eY3R+spOzUmo553I+3ejeKihvn2DdRFP209h4qQTif08//jaWmZ9p4ubGfrmk5zuQFfg fFWYR0MtcGKGHAGg331kXhkbQEX5qq+i2K+UDhOhtw0Um3Sf6WbE1ioobw+38bAqslAmwKFU5 ov5nQfMVRB6xgb8Rb04Im5yhtTgJKAzrPpjHHL9ho40l79/uysfH1/aIPjWUrETFb/QrJvs40 BCG4YNr6oed3qS+IFyiUAzr2k+HI0S1KLSCabB+qQ2PAXPBOOpOKd+8M4ku3NAJ518YSr61Aq FdcrIk6MeTRfeS2wHfTe7W/0yo5JDKebowS3zI+ttmzwIzHxzH4neHN/S836o2WOpleXQEi/b 7YYTbDOeEpxM7Jp0ItVV57ZKXTTU62DXWcyenkYatpQcxRPa1D2iL8MgMDrPVSROK+YLCNqK0 x6v9/OwUp8Mhgij9O/4uKu8PDKTix2gJYjQ1rhQzdhYNP8TaSgJRiK2I5fHhRG4NIa/xiwOVI cmFbK4XKciBRifni8RiwtOdY0DVMnm4czkzJ2hSlo39C8WDqfuewlnvi9pQ= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 212.227.126.187 Subject: [Qemu-devel] [PATCH v8 05/10] hw/m68k: implement ADB bus support for via X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Fam Zheng , qemu-block@nongnu.org, Thomas Huth , Jason Wang , Mark Cave-Ayland , Laurent Vivier , "Dr . David Alan Gilbert" , =?utf-8?b?SGVydsOp?= =?utf-8?q?_Poussineau?= , Gerd Hoffmann , Paolo Bonzini , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Max Reitz , Aurelien Jarno Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Co-developed-by: Mark Cave-Ayland Signed-off-by: Mark Cave-Ayland Signed-off-by: Laurent Vivier Reviewed-by: Hervé Poussineau Reviewed-by: Thomas Huth --- hw/misc/mac_via.c | 190 ++++++++++++++++++++++++++++++++++++++ include/hw/misc/mac_via.h | 7 ++ 2 files changed, 197 insertions(+) diff --git a/hw/misc/mac_via.c b/hw/misc/mac_via.c index baa87c2879..4249632a57 100644 --- a/hw/misc/mac_via.c +++ b/hw/misc/mac_via.c @@ -238,10 +238,16 @@ * Table 19-10 ADB transaction states */ +#define ADB_STATE_NEW 0 +#define ADB_STATE_EVEN 1 +#define ADB_STATE_ODD 2 +#define ADB_STATE_IDLE 3 + #define VIA1B_vADB_StateMask (VIA1B_vADBS1 | VIA1B_vADBS2) #define VIA1B_vADB_StateShift 4 #define VIA_TIMER_FREQ (783360) +#define VIA_ADB_POLL_FREQ 50 /* XXX: not real */ /* VIA returns time offset from Jan 1, 1904, not 1970 */ #define RTC_OFFSET 2082844800 @@ -423,6 +429,181 @@ static void via1_rtc_update(MacVIAState *m) } } +static int adb_via_poll(MacVIAState *s, int state, uint8_t *data) +{ + if (state != ADB_STATE_IDLE) { + return 0; + } + + if (s->adb_data_in_size < s->adb_data_in_index) { + return 0; + } + + if (s->adb_data_out_index != 0) { + return 0; + } + + s->adb_data_in_index = 0; + s->adb_data_out_index = 0; + s->adb_data_in_size = adb_poll(&s->adb_bus, s->adb_data_in, 0xffff); + + if (s->adb_data_in_size) { + *data = s->adb_data_in[s->adb_data_in_index++]; + qemu_irq_raise(s->adb_data_ready); + } + + return s->adb_data_in_size; +} + +static int adb_via_send(MacVIAState *s, int state, uint8_t data) +{ + switch (state) { + case ADB_STATE_NEW: + s->adb_data_out_index = 0; + break; + case ADB_STATE_EVEN: + if ((s->adb_data_out_index & 1) == 0) { + return 0; + } + break; + case ADB_STATE_ODD: + if (s->adb_data_out_index & 1) { + return 0; + } + break; + case ADB_STATE_IDLE: + return 0; + } + + assert(s->adb_data_out_index < sizeof(s->adb_data_out) - 1); + + s->adb_data_out[s->adb_data_out_index++] = data; + qemu_irq_raise(s->adb_data_ready); + return 1; +} + +static int adb_via_receive(MacVIAState *s, int state, uint8_t *data) +{ + switch (state) { + case ADB_STATE_NEW: + return 0; + + case ADB_STATE_EVEN: + if (s->adb_data_in_size <= 0) { + qemu_irq_raise(s->adb_data_ready); + return 0; + } + + if (s->adb_data_in_index >= s->adb_data_in_size) { + *data = 0; + qemu_irq_raise(s->adb_data_ready); + return 1; + } + + if ((s->adb_data_in_index & 1) == 0) { + return 0; + } + + break; + + case ADB_STATE_ODD: + if (s->adb_data_in_size <= 0) { + qemu_irq_raise(s->adb_data_ready); + return 0; + } + + if (s->adb_data_in_index >= s->adb_data_in_size) { + *data = 0; + qemu_irq_raise(s->adb_data_ready); + return 1; + } + + if (s->adb_data_in_index & 1) { + return 0; + } + + break; + + case ADB_STATE_IDLE: + if (s->adb_data_out_index == 0) { + return 0; + } + + s->adb_data_in_size = adb_request(&s->adb_bus, s->adb_data_in, + s->adb_data_out, + s->adb_data_out_index); + s->adb_data_out_index = 0; + s->adb_data_in_index = 0; + if (s->adb_data_in_size < 0) { + *data = 0xff; + qemu_irq_raise(s->adb_data_ready); + return -1; + } + + if (s->adb_data_in_size == 0) { + return 0; + } + + break; + } + + assert(s->adb_data_in_index < sizeof(s->adb_data_in) - 1); + + *data = s->adb_data_in[s->adb_data_in_index++]; + qemu_irq_raise(s->adb_data_ready); + if (*data == 0xff || *data == 0) { + return 0; + } + return 1; +} + +static void via1_adb_update(MacVIAState *m) +{ + MOS6522Q800VIA1State *v1s = MOS6522_Q800_VIA1(&m->mos6522_via1); + MOS6522State *s = MOS6522(v1s); + int state; + int ret; + + state = (s->b & VIA1B_vADB_StateMask) >> VIA1B_vADB_StateShift; + + if (s->acr & VIA1ACR_vShiftOut) { + /* output mode */ + ret = adb_via_send(m, state, s->sr); + if (ret > 0) { + s->b &= ~VIA1B_vADBInt; + } else { + s->b |= VIA1B_vADBInt; + } + } else { + /* input mode */ + ret = adb_via_receive(m, state, &s->sr); + if (ret > 0 && s->sr != 0xff) { + s->b &= ~VIA1B_vADBInt; + } else { + s->b |= VIA1B_vADBInt; + } + } +} + +static void via_adb_poll(void *opaque) +{ + MacVIAState *m = opaque; + MOS6522Q800VIA1State *v1s = MOS6522_Q800_VIA1(&m->mos6522_via1); + MOS6522State *s = MOS6522(v1s); + int state; + + if (s->b & VIA1B_vADBInt) { + state = (s->b & VIA1B_vADB_StateMask) >> VIA1B_vADB_StateShift; + if (adb_via_poll(m, state, &s->sr)) { + s->b &= ~VIA1B_vADBInt; + } + } + + timer_mod(m->adb_poll_timer, + qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + + (NANOSECONDS_PER_SECOND / VIA_ADB_POLL_FREQ)); +} + static uint64_t mos6522_q800_via1_read(void *opaque, hwaddr addr, unsigned size) { MOS6522Q800VIA1State *s = MOS6522_Q800_VIA1(opaque); @@ -485,6 +666,10 @@ static void mac_via_reset(DeviceState *dev) { MacVIAState *m = MAC_VIA(dev); + timer_mod(m->adb_poll_timer, + qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + + (NANOSECONDS_PER_SECOND / VIA_ADB_POLL_FREQ)); + timer_mod(m->VBL_timer, (qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + 16630) / 16630 * 16630); @@ -523,6 +708,10 @@ static void mac_via_realize(DeviceState *dev, Error **errp) qemu_get_timedate(&tm, 0); m->tick_offset = (uint32_t)mktimegm(&tm) + RTC_OFFSET; + + m->adb_poll_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, via_adb_poll, m); + m->adb_data_ready = qdev_get_gpio_in_named(dev, "via1-irq", + VIA1_IRQ_ADB_READY_BIT); } static void mac_via_init(Object *obj) @@ -571,6 +760,7 @@ static void mos6522_q800_via1_portB_write(MOS6522State *s) MacVIAState *m = container_of(v1s, MacVIAState, mos6522_via1); via1_rtc_update(m); + via1_adb_update(m); v1s->last_b = s->b; } diff --git a/include/hw/misc/mac_via.h b/include/hw/misc/mac_via.h index 69bdecabb0..2181140293 100644 --- a/include/hw/misc/mac_via.h +++ b/include/hw/misc/mac_via.h @@ -97,6 +97,13 @@ typedef struct MacVIAState { /* ADB */ ADBBusState adb_bus; + QEMUTimer *adb_poll_timer; + qemu_irq adb_data_ready; + int adb_data_in_size; + int adb_data_in_index; + int adb_data_out_index; + uint8_t adb_data_in[128]; + uint8_t adb_data_out[16]; /* external timers */ QEMUTimer *one_second_timer;