From patchwork Tue Oct 22 11:17:33 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Laurent Vivier X-Patchwork-Id: 1181247 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) 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 46yB2G218rz9sCJ for ; Tue, 22 Oct 2019 22:23:02 +1100 (AEDT) Received: from localhost ([::1]:53490 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iMsFf-0001k2-Qa for incoming@patchwork.ozlabs.org; Tue, 22 Oct 2019 07:22:59 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44156) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iMsBN-0004ei-9A for qemu-devel@nongnu.org; Tue, 22 Oct 2019 07:18:34 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iMsBK-0007oo-9o for qemu-devel@nongnu.org; Tue, 22 Oct 2019 07:18:32 -0400 Received: from mout.kundenserver.de ([217.72.192.74]:55347) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1iMsBJ-0007o7-Vc; Tue, 22 Oct 2019 07:18:30 -0400 Received: from localhost.localdomain ([78.238.229.36]) by mrelayeu.kundenserver.de (mreue109 [212.227.15.183]) with ESMTPSA (Nemesis) id 1McY0J-1hkW5K2Yw9-00czjv; Tue, 22 Oct 2019 13:17:59 +0200 From: Laurent Vivier To: qemu-devel@nongnu.org Subject: [PATCH v14 4/9] hw/m68k: implement ADB bus support for via Date: Tue, 22 Oct 2019 13:17:33 +0200 Message-Id: <20191022111738.20803-5-laurent@vivier.eu> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20191022111738.20803-1-laurent@vivier.eu> References: <20191022111738.20803-1-laurent@vivier.eu> MIME-Version: 1.0 X-Provags-ID: V03:K1:F7fu6Z+6FksfunG2Z2SbJ3mRvoBcwz8x5z8lT60EGjqe4speIiU wvBRaoEbRZ4Yw5JXrFRlwyrmqYRP/Sey6nVQoQZmQZihcd2EGWRegZO6N90SzS+ANjo79eg SJhInO72BoMuhkvrqsctxnQrnNhwkAltLufsmR3mXz/f36VkTEskDxoqEgD50YfXCNu/ICM mXIbNsDlW3Q36pVaF5/nA== X-UI-Out-Filterresults: notjunk:1; V03:K0:43v2KnH9owo=:dPSL4ja+w1V+8CzwKswV/j LHfF4Eg4AQ4xwH5mzefsjmRexy93Om+J9RYdiVBqmdPe+pMHyTfNY7VQep3pX+6ai1CRnVyMJ vj1Vg+iUY7kdC+v3ICQY0UqyskozW6hLumaSjd4BRsQ5y1PLUfa0RITT6aAl8Hg1lo6ROh4y6 U28rlWHCJGlxfeqg1Ytp8ulf+aEMABIHzeQ0PBF5EflfyGBk3SGJxr2a0f/uMabdFVXeTtoRT /wHMBoEoqsRm1NZ2qCWqVpeup8h2VC8oYuJO6iWz0zaEMDJOiSWK0tt8SNJbu1Q2WCngAt0OX QYkI9QkLCgvXD3cfU1ceHAW9DJbnqZ4zZZcoCUQbDjbHYvb9qAYTa/i0hYRNCZ/UhjkFqPxb5 PNtLE9kvDgKgIxqO6LJUficmV1N5vuDD0v8um/YKia/9NhJ8encEEzQbdMO/nTaWx38LQMPSJ 56DAi5WKDspN5Euz9TNVB878mYD6N/yFmXafWeyDCIBnEMob1LrgTe87zeVW87P/ckIAN7Gjn 0xbxCN8LC/RL9vUWQMQ3OwleW45TrIEbAuNxfJgU/hPsx8kZC4RqHho4VpXexqSen4IG9aBVa GDF3MTvoOmkiXvxkfgtH/cO9rHRWv+oo4ydRd/IV8xcpaWungal4Ehs42y0aQa4tlDtC8mTe7 0lS6Yh2Y1SzVBiH1nJ9uLvzxh4HKQTfikOJjivlzRkVhjHlURWWXR4eFzFGlYaOC0wqlotinF V5aoazgDJaluQoE9JBNrN2vZfwP/VSyIo0efjt11MDNZ/6QmyNtQGN9JflCCg2FW3/0uqV1Xf hxDwXEpapoGa9BC3D3oAr0BglxGl+QvEsnuDTIuK3m4xdrbK52Y8ietQaRiuMtLGDHVOly2gN fXkeJgcdhMrqwKjCU70dOKSeEkHIn7QZ7jg42R17g= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 217.72.192.74 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 , "Dr . David Alan Gilbert" , Laurent Vivier , =?utf-8?q?Herv=C3=A9_Poussineau?= , Gerd Hoffmann , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Paolo Bonzini , Max Reitz , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Aurelien Jarno Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" VIA needs to be able to poll the ADB interface and to read/write data from/to the bus. This patch adds functions allowing that. 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 --- include/hw/misc/mac_via.h | 7 ++ hw/misc/mac_via.c | 197 ++++++++++++++++++++++++++++++++++++++ hw/misc/Kconfig | 1 + 3 files changed, 205 insertions(+) diff --git a/include/hw/misc/mac_via.h b/include/hw/misc/mac_via.h index efc8ef3ce3..3f86fcb7e1 100644 --- a/include/hw/misc/mac_via.h +++ b/include/hw/misc/mac_via.h @@ -103,6 +103,13 @@ 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]; } MacVIAState; #endif diff --git a/hw/misc/mac_via.c b/hw/misc/mac_via.c index d2da8b8e60..f3f130ad96 100644 --- a/hw/misc/mac_via.c +++ b/hw/misc/mac_via.c @@ -264,10 +264,16 @@ * 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 @@ -472,6 +478,181 @@ 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); @@ -553,6 +734,10 @@ static void mac_via_reset(DeviceState *dev) MacVIAState *m = MAC_VIA(dev); MOS6522Q800VIA1State *v1s = &m->mos6522_via1; + timer_mod(m->adb_poll_timer, + qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + + (NANOSECONDS_PER_SECOND / VIA_ADB_POLL_FREQ)); + timer_del(v1s->VBL_timer); v1s->next_VBL = 0; timer_del(v1s->one_second_timer); @@ -593,6 +778,10 @@ 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) @@ -642,6 +831,13 @@ static const VMStateDescription vmstate_mac_via = { VMSTATE_UINT8(cmd, MacVIAState), VMSTATE_INT32(wprotect, MacVIAState), VMSTATE_INT32(alt, MacVIAState), + /* ADB */ + VMSTATE_TIMER_PTR(adb_poll_timer, MacVIAState), + VMSTATE_INT32(adb_data_in_size, MacVIAState), + VMSTATE_INT32(adb_data_in_index, MacVIAState), + VMSTATE_INT32(adb_data_out_index, MacVIAState), + VMSTATE_BUFFER(adb_data_in, MacVIAState), + VMSTATE_BUFFER(adb_data_out, MacVIAState), VMSTATE_END_OF_LIST() } }; @@ -671,6 +867,7 @@ 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/hw/misc/Kconfig b/hw/misc/Kconfig index 18a5dc9c09..2164646553 100644 --- a/hw/misc/Kconfig +++ b/hw/misc/Kconfig @@ -123,5 +123,6 @@ config UNIMP config MAC_VIA bool select MOS6522 + select ADB source macio/Kconfig